Hollow One (Card)

Hollow One

In 3012 decks 0% of 5080282 decks

Group by

Sort by

Filters Card Filters

The Capitoline Triad

16.79% of 1566 decks 263 decks

Gavi, Nest Warden

6.62% of 3807 decks 252 decks

Sharuum the Hegemon

5.84% of 2004 decks 117 decks

Zirda, the Dawnwaker

6.11% of 1751 decks 107 decks

Kydele, Chosen of Kruphix // Ravos, Soultender

26.65% of 364 decks 97 decks

Bladewing, Deathless Tyrant

7.52% of 1250 decks 94 decks

Demonlord Belzenlok

34.19% of 272 decks 93 decks

Brallin, Skyshark Rider // Shabraz, the Skyshark

2.74% of 2845 decks 78 decks

Toluz, Clever Conductor

6.46% of 1176 decks 76 decks

Urza, Powerstone Prodigy

13.38% of 538 decks 72 decks

Kenrith, the Returned King

0.30% of 22069 decks 67 decks

Codie, Vociferous Codex

1.17% of 5740 decks 67 decks

Queza, Augur of Agonies

1.02% of 6561 decks 67 decks

Asmoranomardicadaistinaculdacar

1.88% of 3449 decks 65 decks

The Raven Man

6.37% of 973 decks 62 decks

Flubs, the Fool

0.67% of 9074 decks 61 decks

Sefris of the Hidden Ways

0.65% of 8766 decks 57 decks

Anje Falkenrath

1.01% of 4766 decks 48 decks

New Cards

Slavering Branchsnapper

47% of 57 decks +47% synergy

Spectral Snatcher

45% of 114 decks +44% synergy

Bedhead Beastie

38% of 112 decks +37% synergy

Daggermaw Megalodon

29% of 127 decks +29% synergy

Shepherding Spirits

28% of 100 decks +28% synergy

High Synergy Cards

Archfiend of Ifnir

78% of 1659 decks +76% synergy

Astral Drift

72% of 1558 decks +72% synergy

Flourishing Fox

68% of 1548 decks +68% synergy

Drifting Meadow

67% of 1567 decks +66% synergy

Street Wraith

67% of 1659 decks +66% synergy

Drannith Healer

65% of 1548 decks +65% synergy

Secluded Steppe

67% of 1567 decks +64% synergy

Curator of Mysteries

64% of 1609 decks +64% synergy

Valiant Rescuer

64% of 1548 decks +63% synergy

Drannith Stinger

61% of 1462 decks +61% synergy

Top Cards

Nimble Obstructionist

61% of 1609 decks +60% synergy

Raugrin Crystal

58% of 598 decks +56% synergy

Zenith Flare

56% of 834 decks +56% synergy

Angel of the Ruins

56% of 1514 decks +53% synergy

Herald of the Forgotten

55% of 1549 decks +55% synergy

Fluctuator

55% of 3012 decks +55% synergy

Astral Slide

54% of 1567 decks +53% synergy

Troll of Khazad-dûm

53% of 1123 decks +51% synergy

Shardless Outlander

52% of 180 decks +52% synergy

Countervailing Winds

51% of 1609 decks +51% synergy

Creatures

The Balrog of Moria

49% of 480 decks +46% synergy

Krosan Tusker

49% of 754 decks +48% synergy

Titanoth Rex

47% of 736 decks +45% synergy

Shefet Monitor

46% of 754 decks +46% synergy

Greater Sandwurm

45% of 754 decks +45% synergy

Timeless Dragon

44% of 1500 decks +43% synergy

Oliphaunt

43% of 1044 decks +42% synergy

Loot, Exuberant Explorer

43% of 7 decks +16% synergy

Generous Ent

43% of 540 decks +42% synergy

Rampaging War Mammoth

42% of 1009 decks +41% synergy

Imposing Vantasaur

42% of 1548 decks +41% synergy

Vile Manifestation

41% of 1659 decks +41% synergy

Horror of the Broken Lands

41% of 1659 decks +41% synergy

Vizier of Tumbling Sands

40% of 1609 decks +39% synergy

Rooting Moloch

40% of 1462 decks +40% synergy

Surly Badgersaur

39% of 1462 decks +38% synergy

Warped Tusker

39% of 170 decks +38% synergy

Yidaro, Wandering Monster

39% of 1462 decks +38% synergy

Bone Miser

38% of 1632 decks +37% synergy

Glint-Horn Buccaneer

37% of 1465 decks +36% synergy

Eternal Dragon

35% of 1567 decks +35% synergy

Cloud of Faeries

35% of 1609 decks +33% synergy

Eagles of the North

35% of 1029 decks +34% synergy

Pale Recluse

34% of 467 decks +34% synergy

Mischievous Mystic

34% of 32 decks +28% synergy

Drownyard Lurker

33% of 330 decks +32% synergy

Rampaging Hippo

32% of 754 decks +32% synergy

Kiora, the Rising Tide

31% of 16 decks +19% synergy

Monstrous Carabid

31% of 712 decks +31% synergy

Igneous Pouncer

31% of 712 decks +31% synergy

Homunculus Horde

31% of 78 decks +25% synergy

Ruin Grinder

30% of 1431 decks +30% synergy

Jhessian Zombies

30% of 939 decks +30% synergy

Abyssal Harvester

29% of 17 decks +14% synergy

Jungle Weaver

29% of 754 decks +29% synergy

Splendor Mare

26% of 1548 decks +26% synergy

Void Beckoner

26% of 1615 decks +26% synergy

Scion of Darkness

26% of 1659 decks +26% synergy

Gloomfang Mauler

26% of 1190 decks +26% synergy

Lava Serpent

26% of 1462 decks +26% synergy

Brallin, Skyshark Rider

25% of 1462 decks +25% synergy

Glaring Fleshraker

25% of 843 decks +23% synergy

Rielle, the Everwise

24% of 775 decks +23% synergy

Colossal Skyturtle

24% of 494 decks +22% synergy

The Locust God

24% of 781 decks +19% synergy

Rampaging Spiketail

24% of 836 decks +24% synergy

Sanctum Plowbeast

24% of 1197 decks +23% synergy

Nurturing Bristleback

24% of 416 decks +23% synergy

Desert Cerodon

23% of 1479 decks +23% synergy

Seismic Monstrosaur

23% of 661 decks +22% synergy

Instants

Neutralize

49% of 1576 decks +49% synergy

Forsake the Worldly

47% of 1567 decks +47% synergy

Ancient Excavation

40% of 939 decks +39% synergy

Angelsong

35% of 1567 decks +35% synergy

Shadow of the Grave

32% of 1659 decks +32% synergy

Miscalculation

31% of 1609 decks +31% synergy

Wilt

31% of 736 decks +31% synergy

Complicate

31% of 1609 decks +31% synergy

Hieroglyphic Illumination

28% of 1609 decks +27% synergy

Radiant's Judgment

27% of 1567 decks +27% synergy

Starstorm

26% of 1479 decks +25% synergy

Swords to Plowshares

25% of 1567 decks -38% synergy

Lull

22% of 754 decks +22% synergy

Shredded Sails

22% of 1462 decks +22% synergy

Bulk Up

21% of 14 decks +11% synergy

Expunge

21% of 1659 decks +21% synergy

Barrier Breach

21% of 736 decks +20% synergy

Gilded Light

20% of 1567 decks +20% synergy

Rebuild

18% of 1609 decks +18% synergy

Null Elemental Blast

17% of 1082 decks +16% synergy

Censor

17% of 1609 decks +17% synergy

Path to Exile

17% of 1567 decks -29% synergy

Akroma's Blessing

17% of 1567 decks +17% synergy

Thrill of Possibility

17% of 1463 decks +6% synergy

Chaos Warp

17% of 1479 decks -15% synergy

Withering Torment

16% of 132 decks -3% synergy

Demand Answers

15% of 599 decks +8% synergy

Kozilek's Command

15% of 843 decks +14% synergy

Clear

15% of 1567 decks +15% synergy

Songs of the Damned

15% of 1659 decks +14% synergy

Beast Within

14% of 754 decks -24% synergy

Frantic Search

14% of 1609 decks +2% synergy

Without Weakness

14% of 1659 decks +14% synergy

Repopulate

14% of 754 decks +14% synergy

Enlightened Tutor

14% of 1567 decks -4% synergy

Sylvan Reclamation

14% of 467 decks +13% synergy

Dark Ritual

14% of 1659 decks -9% synergy

Eldrazi Confluence

13% of 843 decks +12% synergy

Counterspell

13% of 1609 decks -30% synergy

Stern Lesson

13% of 1318 decks +13% synergy

Raking Claws

13% of 1462 decks +12% synergy

Easy Prey

12% of 1615 decks +12% synergy

Terminate

12% of 712 decks -9% synergy

Ancient Grudge

11% of 406 decks +10% synergy

Thirst for Knowledge

11% of 1609 decks +9% synergy

Eldritch Immunity

11% of 843 decks +9% synergy

Bedevil

10% of 706 decks -4% synergy

Rescind

10% of 1609 decks +10% synergy

Mage's Guile

10% of 1609 decks +10% synergy

Big Score

10% of 1326 decks +1% synergy

Sorceries

Akroma's Vengeance

45% of 1567 decks +45% synergy

Boon of the Wish-Giver

39% of 1576 decks +39% synergy

Blasphemous Edict

36% of 25 decks +3% synergy

Migration Path

34% of 736 decks +31% synergy

Dismantling Wave

34% of 1549 decks +33% synergy

Decree of Justice

34% of 1567 decks +33% synergy

Decree of Pain

33% of 1659 decks +30% synergy

Faithless Looting

32% of 1479 decks +16% synergy

Lórien Revealed

30% of 1078 decks +27% synergy

Beneath the Sands

28% of 754 decks +28% synergy

Living Death

26% of 1659 decks +21% synergy

Unearth

26% of 1659 decks +23% synergy

Razaketh's Rite

26% of 1659 decks +25% synergy

Pest Control

26% of 281 decks +25% synergy

Eerie Ultimatum

25% of 375 decks +13% synergy

Slice and Dice

20% of 1479 decks +19% synergy

Blasphemous Act

19% of 1479 decks -14% synergy

Sweltering Suns

19% of 1479 decks +18% synergy

Cultivate

19% of 754 decks -27% synergy

Wander in Death

18% of 1659 decks +18% synergy

Farseek

17% of 754 decks -17% synergy

Life from the Loam

17% of 754 decks +13% synergy

Go for Blood

17% of 1462 decks +16% synergy

Dread Return

16% of 1659 decks +11% synergy

Damn

16% of 863 decks -1% synergy

Windfall

16% of 1609 decks +3% synergy

Terminal Agony

15% of 691 decks +14% synergy

Change of Fortune

15% of 1373 decks +15% synergy

Idyllic Tutor

14% of 1567 decks +10% synergy

Edge of Autumn

14% of 754 decks +14% synergy

Step Through

14% of 1537 decks +13% synergy

Grab the Prize

14% of 139 decks +7% synergy

Nature's Lore

14% of 754 decks -18% synergy

Approach of the Second Sun

14% of 1567 decks +10% synergy

Cathartic Reunion

12% of 1479 decks +8% synergy

Rampant Growth

12% of 754 decks -23% synergy

Living End

12% of 1659 decks +12% synergy

Jolted Awake

12% of 291 decks +10% synergy

Sacred Excavation

12% of 1609 decks +12% synergy

Selective Obliteration

11% of 843 decks +10% synergy

Migratory Route

11% of 1197 decks +10% synergy

Grave Upheaval

10% of 712 decks +10% synergy

Violent Impact

10% of 1479 decks +10% synergy

Feed the Swarm

10% of 1604 decks -8% synergy

Kodama's Reach

10% of 754 decks -22% synergy

Limits of Solidarity

9% of 1479 decks +9% synergy

Demonic Tutor

9% of 1659 decks -13% synergy

Reanimate

9% of 1659 decks -7% synergy

Ichor Slick

9% of 1659 decks +9% synergy

Splendid Reclamation

9% of 754 decks +5% synergy

Utility Artifacts

Abandoned Sarcophagus

29% of 3012 decks +29% synergy

Matzalantli, the Great Door

21% of 1745 decks +20% synergy

Runaway Boulder

20% of 1567 decks +20% synergy

Rolling Hamsphere

20% of 439 decks +19% synergy

Bag of Holding

19% of 2970 decks +18% synergy

Currency Converter

18% of 2756 decks +18% synergy

Collector's Vault

18% of 1858 decks +16% synergy

Excalibur, Sword of Eden

17% of 619 decks +14% synergy

Brass's Tunnel-Grinder

14% of 772 decks +11% synergy

Wayfarer's Bauble

12% of 3012 decks +2% synergy

Hedron Archive

11% of 3012 decks +8% synergy

Alhammarret's Archive

11% of 3012 decks +9% synergy

Found Footage

10% of 301 decks +10% synergy

Idol of False Gods

10% of 983 decks +9% synergy

Swiftfoot Boots

9% of 3012 decks -19% synergy

Trading Post

9% of 3012 decks +8% synergy

Forsaken Monument

9% of 2918 decks +7% synergy

Conduit of Worlds

8% of 599 decks +2% synergy

Lightning Greaves

8% of 3012 decks -18% synergy

Elixir of Immortality

7% of 3012 decks +6% synergy

Perpetual Timepiece

7% of 3012 decks +6% synergy

Mystic Forge

7% of 2970 decks +4% synergy

Portal to Phyrexia

7% of 2538 decks +5% synergy

Palantír of Orthanc

7% of 2111 decks +5% synergy

Key to the City

7% of 3012 decks +5% synergy

Expedition Map

6% of 3012 decks +3% synergy

Codex Shredder

6% of 3012 decks +5% synergy

Mnemonic Sphere

6% of 1487 decks +5% synergy

God-Pharaoh's Gift

5% of 3012 decks +5% synergy

Enchantments

New Perspectives

50% of 1609 decks +50% synergy

Ominous Seas

49% of 1576 decks +46% synergy

Tectonic Reformation

47% of 1465 decks +46% synergy

Cast Out

43% of 1567 decks +42% synergy

Drake Haven

40% of 1609 decks +40% synergy

Faith of the Devoted

34% of 1659 decks +34% synergy

Unpredictable Cyclone

34% of 1462 decks +34% synergy

Reconnaissance Mission

30% of 1576 decks +26% synergy

Teferi's Ageless Insight

29% of 1562 decks +24% synergy

Lightning Rift

25% of 1479 decks +25% synergy

Crystalline Resonance

24% of 1577 decks +24% synergy

Shark Typhoon

20% of 1576 decks +17% synergy

Dying to Serve

19% of 1546 decks +19% synergy

Footfall Crater

17% of 1462 decks +17% synergy

Escape Protocol

17% of 1576 decks +17% synergy

Feast of Sanity

15% of 1588 decks +15% synergy

On the Trail

15% of 307 decks +13% synergy

Song of Creation

14% of 339 decks +12% synergy

Flame Blitz

14% of 1419 decks +14% synergy

Improbable Alliance

14% of 775 decks +13% synergy

Oversold Cemetery

14% of 1659 decks +12% synergy

Lay Claim

14% of 1609 decks +13% synergy

Walk-In Closet // Forgotten Cellar

11% of 27 decks -1% synergy

Echoes of Eternity

11% of 1071 decks +9% synergy

Insidious Roots

10% of 192 decks +2% synergy

Decree of Silence

10% of 1609 decks +10% synergy

Mirari's Wake

10% of 467 decks -3% synergy

Tortured Existence

10% of 1659 decks +8% synergy

Invigorating Boon

8% of 754 decks +8% synergy

Spelunking

8% of 431 decks +3% synergy

Rhystic Study

8% of 1609 decks -19% synergy

Mystic Remora

8% of 1609 decks -10% synergy

Wilderness Reclamation

8% of 748 decks +4% synergy

Artist's Talent

7% of 214 decks +4% synergy

Smothering Tithe

7% of 1559 decks -18% synergy

Defiled Crypt // Cadaver Lab

7% of 91 decks +3% synergy

Animate Dead

6% of 1659 decks -3% synergy

Sylvan Library

6% of 754 decks -5% synergy

Impact Tremors

6% of 1479 decks -4% synergy

Leyline of the Guildpact

6% of 67 decks -17% synergy

Crystal Carapace

6% of 559 decks +6% synergy

Monstrous Vortex

6% of 204 decks +3% synergy

Spirit Cairn

6% of 1567 decks +6% synergy

Scavenger's Talent

5% of 182 decks +3% synergy

Wizard Class

5% of 1500 decks +1% synergy

Midnight Snack

5% of 58 decks +3% synergy

Funeral Room // Awakening Hall

5% of 158 decks +0% synergy

Underworld Breach

5% of 1462 decks -1% synergy

Rune of Protection: Red

5% of 1567 decks +5% synergy

Planeswalkers

Ugin, the Ineffable

7% of 2979 decks +6% synergy

Teferi, Temporal Pilgrim

5% of 1318 decks +3% synergy

Utility Lands

Lonely Sandbar

59% of 1609 decks +56% synergy

Barren Moor

58% of 1659 decks +54% synergy

Remote Isle

57% of 1609 decks +56% synergy

Forgotten Cave

56% of 1479 decks +52% synergy

Desert of the True

54% of 1567 decks +53% synergy

Smoldering Crater

51% of 1479 decks +50% synergy

Polluted Mire

51% of 1659 decks +50% synergy

Desert of the Mindful

46% of 1609 decks +45% synergy

Slippery Karst

43% of 754 decks +42% synergy

Tranquil Thicket

42% of 754 decks +38% synergy

Desert of the Fervent

41% of 1479 decks +39% synergy

Desert of the Glorified

41% of 1659 decks +40% synergy

Blasted Landscape

36% of 3012 decks +35% synergy

Desert of the Indomitable

30% of 754 decks +29% synergy

Reliquary Tower

27% of 3012 decks -3% synergy

Geier Reach Sanitarium

21% of 3012 decks +18% synergy

Fountainport

17% of 481 decks +13% synergy

Bojuka Bog

16% of 1659 decks -14% synergy

Soulstone Sanctuary

15% of 68 decks +13% synergy

Boseiju, Who Endures

14% of 696 decks -5% synergy

Darksteel Citadel

12% of 3012 decks +9% synergy

Fomori Vault

11% of 1096 decks +10% synergy

Buried Ruin

11% of 3012 decks +6% synergy

War Room

11% of 2916 decks +4% synergy

Temple of the False God

10% of 3012 decks +1% synergy

Rogue's Passage

10% of 3012 decks -10% synergy

Otawara, Soaring City

9% of 1487 decks -8% synergy

Spymaster's Vault

9% of 459 decks +5% synergy

Trenchpost

9% of 843 decks +8% synergy

Takenuma, Abandoned Mire

9% of 1534 decks -2% synergy

Shrine of the Forsaken Gods

8% of 3012 decks +7% synergy

Mistveil Plains

8% of 1567 decks +7% synergy

Urza's Tower

8% of 3012 decks +6% synergy

Urza's Mine

8% of 3012 decks +6% synergy

Shifting Woodland

8% of 232 decks -2% synergy

Hall of Heliod's Generosity

8% of 1558 decks +1% synergy

Urza's Power Plant

8% of 3012 decks +6% synergy

Mystic Sanctuary

8% of 1584 decks -5% synergy

Restless Vents

7% of 365 decks +5% synergy

Arid Archway

7% of 1165 decks +6% synergy

Seat of the Synod

7% of 1609 decks +1% synergy

Cabal Coffers

7% of 1659 decks -4% synergy

Urza's Saga

7% of 2886 decks -1% synergy

Ancient Tomb

6% of 3012 decks -4% synergy

Treasure Vault

6% of 2835 decks +4% synergy

Rix Maadi, Dungeon Palace

6% of 712 decks +6% synergy

Desolate Lighthouse

6% of 781 decks +2% synergy

Inventors' Fair

6% of 3012 decks +2% synergy

Urborg, Tomb of Yawgmoth

6% of 3012 decks -4% synergy

Scavenger Grounds

6% of 3012 decks +2% synergy

Mana Artifacts

Sol Ring

71% of 3012 decks -13% synergy

Arcane Signet

54% of 2961 decks -18% synergy

Indatha Crystal

33% of 375 decks +32% synergy

Zagoth Crystal

30% of 388 decks +29% synergy

Rakdos Signet

29% of 712 decks -1% synergy

Boros Signet

28% of 837 decks +5% synergy

Azorius Signet

27% of 1197 decks +1% synergy

Savai Crystal

26% of 316 decks +25% synergy

Izzet Signet

25% of 781 decks -3% synergy

Mind Stone

23% of 3012 decks +5% synergy

Talisman of Indulgence

22% of 712 decks -5% synergy

Dimir Signet

21% of 939 decks -9% synergy

Ketria Crystal

18% of 339 decks +18% synergy

Talisman of Conviction

18% of 834 decks -5% synergy

Talisman of Hierarchy

18% of 894 decks -7% synergy

Talisman of Dominance

17% of 939 decks -14% synergy

Orzhov Signet

17% of 897 decks -10% synergy

Thought Vessel

15% of 3012 decks -2% synergy

Talisman of Progress

14% of 1197 decks -9% synergy

Talisman of Creativity

14% of 775 decks -15% synergy

Fellwar Stone

12% of 3012 decks -9% synergy

Commander's Sphere

11% of 3012 decks -4% synergy

Thran Dynamo

11% of 3012 decks +6% synergy

Fire Diamond

6% of 1479 decks +1% synergy

Dreamstone Hedron

6% of 3012 decks +5% synergy

Basalt Monolith

6% of 3012 decks +3% synergy

Decanter of Endless Water

6% of 2679 decks +1% synergy

Talisman of Resilience

6% of 537 decks -6% synergy

Worn Powerstone

5% of 3012 decks +3% synergy

Chromatic Lantern

5% of 3012 decks -4% synergy

Stonespeaker Crystal

5% of 2679 decks +5% synergy

Everflowing Chalice

5% of 3012 decks +1% synergy

Golgari Signet

5% of 542 decks -7% synergy

Lands

Irrigated Farmland

75% of 1197 decks +67% synergy

Fetid Pools

69% of 939 decks +63% synergy

Contaminated Landscape

60% of 175 decks +48% synergy

Scattered Groves

58% of 467 decks +49% synergy

Perilous Landscape

57% of 130 decks +45% synergy

Canyon Slough

55% of 712 decks +49% synergy

Raffine's Tower

55% of 698 decks +28% synergy

Command Tower

53% of 3012 decks -21% synergy

Raugrin Triome

50% of 598 decks +23% synergy

Indatha Triome

47% of 375 decks +16% synergy

Ash Barrens

47% of 3012 decks +42% synergy

Zagoth Triome

45% of 388 decks +14% synergy

Xander's Lounge

45% of 286 decks +18% synergy

Spara's Headquarters

44% of 344 decks +13% synergy

Ziatora's Proving Ground

43% of 269 decks +12% synergy

Ketria Triome

43% of 339 decks +11% synergy

Savai Triome

42% of 316 decks +15% synergy

Sheltered Thicket

40% of 406 decks +32% synergy

Jetmir's Garden

38% of 215 decks +5% synergy

Shattered Landscape

34% of 64 decks +22% synergy

Smoldering Marsh

33% of 712 decks +0% synergy

Twisted Landscape

33% of 61 decks +13% synergy

Foreboding Landscape

32% of 74 decks +20% synergy

Bountiful Landscape

32% of 87 decks +17% synergy

Tranquil Landscape

31% of 86 decks +16% synergy

Blood Crypt

31% of 712 decks -7% synergy

Seething Landscape

31% of 59 decks +15% synergy

Arcane Sanctum

30% of 760 decks +3% synergy

Mystic Monastery

29% of 600 decks +3% synergy

Deceptive Landscape

29% of 79 decks +17% synergy

Stomping Ground

27% of 406 decks -14% synergy

Overgrown Tomb

27% of 542 decks -15% synergy

Dragonskull Summit

26% of 712 decks -5% synergy

Hallowed Fountain

26% of 1197 decks -14% synergy

Watery Grave

26% of 939 decks -15% synergy

Godless Shrine

26% of 897 decks -15% synergy

Steam Vents

24% of 781 decks -14% synergy

Sheltering Landscape

24% of 46 decks +11% synergy

Sacred Foundry

24% of 837 decks -12% synergy

Raucous Theater

24% of 268 decks +11% synergy

Prairie Stream

23% of 1197 decks -10% synergy

Caves of Koilos

23% of 897 decks -5% synergy

Temple Garden

23% of 467 decks -17% synergy

Breeding Pool

23% of 541 decks -18% synergy

Hidden Grotto

22% of 534 decks +21% synergy

Exotic Orchard

21% of 3012 decks -15% synergy

Boros Garrison

19% of 837 decks +5% synergy

Commercial District

19% of 171 decks +7% synergy

Sunken Hollow

19% of 939 decks -15% synergy

Clifftop Retreat

19% of 837 decks -10% synergy