Horobi, Death's Wail (Card)

Horobi, Death's Wail
In 6647 decks 0.19% of 3425512 decks
Background image for From the Brim to the Trim - Targeting Opponents and Budgets alike
Arnaud Gompertz
Sep 25, 2024
From the Brim to the Trim - Targeting Opponents and Budgets alike
Wreak mono-black destruction with this Horobi, Death's Wail budget deck!
Background image for Ultra Budget Brews - The Exploding Cost of EDH: A Budget Brew Review
Andrew Cummings
Oct 23, 2020
Ultra Budget Brews - The Exploding Cost of EDH: A Budget Brew Review
The cost of Commander is rising. Let's examine that rise, and how to keep brewing on a budget!
Cardsphere
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
King of the Oathbreakers
62.50% of 3760 decks 2350 decks
Iname, Death Aspect
65.80% of 728 decks 479 decks
Skeleton Ship
35.38% of 1012 decks 358 decks
Shay Cormac
23.41% of 1354 decks 317 decks
Kenrith, the Returned King
0.91% of 26243 decks 239 decks
Marchesa, Dealer of Death
2.71% of 5093 decks 138 decks
Yawgmoth, Thran Physician
1.40% of 5979 decks 84 decks
Vhati il-Dal
20.76% of 395 decks 82 decks
Gisa, the Hellraiser
1.52% of 4665 decks 71 decks
The Wise Mothman
0.30% of 23354 decks 71 decks
Tetzimoc, Primal Death
62.38% of 101 decks 63 decks
Gyome, Master Chef
1.49% of 3755 decks 56 decks
Iname as One
14.62% of 342 decks 50 decks
Kelsien, the Plague
0.88% of 5485 decks 48 decks
Vilis, Broker of Blood
4.08% of 1078 decks 44 decks
Infernal Kirin
25.29% of 170 decks 43 decks
Kyoki, Sanity's Eclipse
35.11% of 94 decks 33 decks
O-Kagachi, Vengeful Kami
2.02% of 1637 decks 33 decks
K'rrik, Son of Yawgmoth
0.19% of 16985 decks 33 decks
Kuro, Pitlord
31.68% of 101 decks 32 decks
New Cards
Infinite Guideline Station
5% of 66 decks +4% synergy
Icetill Explorer
4% of 158 decks +4% synergy
Vernal Fen
3% of 174 decks +3% synergy
Terrasymbiosis
3% of 178 decks +3% synergy
Adagia, Windswept Bastion
3% of 463 decks +3% synergy
High Synergy Cards
Swords to Plowshares
62% of 3594 decks +62% synergy
Drogskol Reinforcements
59% of 3594 decks +59% synergy
Selfless Spirit
56% of 3594 decks +56% synergy
Windborn Muse
55% of 3594 decks +55% synergy
Guardian of Faith
55% of 3594 decks +55% synergy
Cauldron Haze
54% of 3594 decks +54% synergy
Thalisse, Reverent Medium
53% of 3594 decks +53% synergy
Path to Exile
53% of 3594 decks +53% synergy
Clarion Spirit
50% of 3594 decks +50% synergy
Scapegoat
49% of 3594 decks +49% synergy
Top Cards
Intangible Virtue
49% of 3594 decks +49% synergy
Katilda, Dawnhart Martyr
49% of 3594 decks +49% synergy
Twilight Drover
46% of 3594 decks +46% synergy
Cultivate
46% of 1114 decks +46% synergy
Drumbellower
44% of 3594 decks +44% synergy
Kami of False Hope
44% of 3594 decks +44% synergy
Haunted Library
44% of 3594 decks +44% synergy
Eerie Interlude
43% of 3594 decks +43% synergy
Counterspell
41% of 1455 decks +40% synergy
Shadow Summoning
40% of 3594 decks +40% synergy
Game Changers
Teferi's Protection
31% of 3594 decks +31% synergy
Seedborn Muse
24% of 1114 decks +24% synergy
Smothering Tithe
20% of 3594 decks +19% synergy
Rhystic Study
17% of 1455 decks +17% synergy
Demonic Tutor
15% of 6647 decks +15% synergy
Cyclonic Rift
12% of 1455 decks +12% synergy
Vampiric Tutor
10% of 6647 decks +10% synergy
Fierce Guardianship
8% of 1455 decks +8% synergy
Worldly Tutor
8% of 1114 decks +8% synergy
Kinnan, Bonder Prodigy
7% of 589 decks +7% synergy
Creatures
Mirror Entity
38% of 3594 decks +38% synergy
Zirda, the Dawnwaker
38% of 534 decks +37% synergy
Moonshaker Cavalry
37% of 3594 decks +37% synergy
Myojin of Blooming Dawn
37% of 3594 decks +36% synergy
Drogskol Cavalry
36% of 3594 decks +36% synergy
Willbreaker
36% of 1455 decks +36% synergy
Oyobi, Who Split the Heavens
35% of 3594 decks +35% synergy
Biomancer's Familiar
35% of 589 decks +35% synergy
Crypt Ghast
35% of 6647 decks +35% synergy
Hanged Executioner
33% of 3594 decks +33% synergy
Skyclave Apparition
31% of 3594 decks +31% synergy
Sakura-Tribe Elder
30% of 1114 decks +30% synergy
Divinity of Pride
30% of 3594 decks +30% synergy
Grey Host Reinforcements
28% of 3594 decks +28% synergy
Agatha of the Vile Cauldron
27% of 492 decks +26% synergy
Faeburrow Elder
25% of 521 decks +25% synergy
Remorseful Cleric
24% of 3594 decks +24% synergy
Phantom General
23% of 3594 decks +23% synergy
Mondrak, Glory Dominus
23% of 3594 decks +23% synergy
Nikko-Onna
22% of 3594 decks +22% synergy
Birds of Paradise
22% of 1114 decks +22% synergy
Kambal, Profiteering Mayor
22% of 2900 decks +21% synergy
Thrummingbird
22% of 1455 decks +21% synergy
Urborg Scavengers
21% of 6647 decks +21% synergy
Infernal Kirin
20% of 6647 decks +20% synergy
Vizier of Tumbling Sands
20% of 1455 decks +20% synergy
Ao, the Dawn Sky
20% of 3594 decks +19% synergy
Flux Channeler
19% of 1455 decks +19% synergy
Eternal Witness
18% of 1114 decks +18% synergy
Ignoble Hierarch
18% of 492 decks +18% synergy
Priest of the Blessed Graf
18% of 3594 decks +18% synergy
Celestial Crusader
18% of 3594 decks +18% synergy
Fathom Mage
17% of 589 decks +17% synergy
Teysa, Envoy of Ghosts
17% of 3594 decks +17% synergy
Kelpie Guide
17% of 1455 decks +17% synergy
Junji, the Midnight Sky
16% of 6647 decks +16% synergy
He Who Hungers
16% of 6647 decks +16% synergy
Ioreth of the Healing House
16% of 1455 decks +16% synergy
Dreamtide Whale
16% of 1138 decks +16% synergy
Magda, the Hoardmaster
16% of 933 decks +16% synergy
Fatestitcher
16% of 1455 decks +16% synergy
Tekuthal, Inquiry Dominus
15% of 1455 decks +15% synergy
Llanowar Elves
15% of 1114 decks +15% synergy
Teysa Karlov
15% of 3594 decks +15% synergy
Spore Frog
15% of 1114 decks +15% synergy
Mentor of the Meek
15% of 3594 decks +14% synergy
Indebted Spirit
14% of 2699 decks +14% synergy
Dust Animus
14% of 2891 decks +14% synergy
Ojer Taq, Deepest Foundation
14% of 3419 decks +13% synergy
Thief of Hope
14% of 6647 decks +13% synergy
Instants
Release to Memory
38% of 3594 decks +38% synergy
Clever Concealment
36% of 3594 decks +36% synergy
Heaven's Gate
35% of 3594 decks +35% synergy
Semester's End
31% of 3594 decks +31% synergy
Anguished Unmaking
30% of 3594 decks +30% synergy
Despark
29% of 3594 decks +29% synergy
Remedy
29% of 3594 decks +28% synergy
Generous Gift
27% of 3594 decks +27% synergy
Dark Ritual
27% of 6647 decks +27% synergy
Beast Within
25% of 1114 decks +24% synergy
Pollen Remedy
25% of 3594 decks +24% synergy
Galadriel's Dismissal
24% of 3515 decks +24% synergy
Assassin's Trophy
24% of 1114 decks +23% synergy
Negate
24% of 1455 decks +23% synergy
Mortify
22% of 3594 decks +22% synergy
Chaos Warp
22% of 1107 decks +21% synergy
Divine Resilience
20% of 2053 decks +20% synergy
Fracture
18% of 3594 decks +18% synergy
Polymorphist's Jest
18% of 1455 decks +18% synergy
Heroic Intervention
18% of 1114 decks +17% synergy
Terminate
17% of 1107 decks +17% synergy
Embolden
17% of 3594 decks +17% synergy
Stroke of Midnight
17% of 3594 decks +17% synergy
Touch of Darkness
17% of 6647 decks +17% synergy
Arcane Denial
17% of 1455 decks +17% synergy
An Offer You Can't Refuse
17% of 1455 decks +16% synergy
Experimental Augury
16% of 1455 decks +16% synergy
Rakdos Charm
16% of 1107 decks +16% synergy
Putrefy
15% of 1114 decks +15% synergy
Aether Shockwave
15% of 3594 decks +15% synergy
Village Rites
14% of 6647 decks +14% synergy
Dramatic Reversal
14% of 1455 decks +14% synergy
Bedevil
13% of 1107 decks +13% synergy
Steady Progress
12% of 1455 decks +12% synergy
Dovin's Veto
12% of 527 decks +12% synergy
Abrade
12% of 1107 decks +12% synergy
Afterlife Insurance
12% of 3085 decks +12% synergy
Flatline
11% of 1418 decks +11% synergy
V.A.T.S.
11% of 6389 decks +11% synergy
Benevolent Offering
11% of 3594 decks +10% synergy
Go for the Throat
11% of 6647 decks +10% synergy
Tragic Slip
10% of 6647 decks +10% synergy
Withering Torment
10% of 4326 decks +10% synergy
Fell the Profane
10% of 5120 decks +10% synergy
Golgari Charm
9% of 1114 decks +9% synergy
Mana Drain
9% of 1455 decks +9% synergy
Deadly Dispute
9% of 6647 decks +9% synergy
Fuel for the Cause
9% of 1455 decks +9% synergy
Infernal Grasp
9% of 6647 decks +9% synergy
Prologue to Phyresis
9% of 1455 decks +8% synergy
Sorceries
Lingering Souls
39% of 3594 decks +39% synergy
Farseek
38% of 1114 decks +38% synergy
Rampant Growth
37% of 1114 decks +37% synergy
Kodama's Reach
35% of 1114 decks +35% synergy
Damn
32% of 3594 decks +32% synergy
Hour of Reckoning
27% of 3594 decks +27% synergy
Nature's Lore
25% of 1114 decks +25% synergy
Blasphemous Act
25% of 1107 decks +25% synergy
Spectral Procession
24% of 3594 decks +24% synergy
Devouring Greed
23% of 6647 decks +23% synergy
Tezzeret's Gambit
21% of 1455 decks +21% synergy
Mass Diminish
20% of 1455 decks +20% synergy
Feed the Swarm
20% of 6647 decks +20% synergy
Contentious Plan
18% of 1455 decks +18% synergy
Three Visits
18% of 1114 decks +18% synergy
Sign in Blood
17% of 6647 decks +17% synergy
Storm of Souls
15% of 3594 decks +15% synergy
Austere Command
15% of 3594 decks +15% synergy
Farewell
15% of 3594 decks +15% synergy
Night's Whisper
15% of 6647 decks +14% synergy
Toxic Deluge
14% of 6647 decks +13% synergy
Vindicate
13% of 3594 decks +13% synergy
Read the Bones
13% of 6647 decks +13% synergy
Ruinous Ultimatum
12% of 534 decks +12% synergy
Reanimate
12% of 6647 decks +12% synergy
Vandalblast
12% of 1107 decks +12% synergy
Faithless Looting
11% of 1107 decks +11% synergy
Diabolic Tutor
11% of 6647 decks +11% synergy
Tempt with Discovery
10% of 1114 decks +10% synergy
Blasphemous Edict
10% of 3841 decks +10% synergy
Skyshroud Claim
10% of 1114 decks +10% synergy
Living Death
9% of 6647 decks +9% synergy
Culling Ritual
9% of 1114 decks +8% synergy
Patriarch's Bidding
8% of 6647 decks +8% synergy
Damnation
8% of 6647 decks +8% synergy
Victimize
8% of 6647 decks +8% synergy
Wrath of God
7% of 3594 decks +7% synergy
Path of the Ghosthunter
7% of 3594 decks +7% synergy
Rise of the Dark Realms
7% of 6647 decks +7% synergy
Exsanguinate
7% of 6647 decks +7% synergy
Vanquish the Horde
7% of 3594 decks +7% synergy
Bubbling Muck
7% of 6647 decks +7% synergy
Harmonize
7% of 1114 decks +6% synergy
Eerie Ultimatum
7% of 521 decks +6% synergy
Disrupt Decorum
7% of 1107 decks +6% synergy
Supreme Verdict
6% of 527 decks +6% synergy
Kaya's Wrath
6% of 3594 decks +6% synergy
Everything Comes to Dust
6% of 3489 decks +6% synergy
Casualties of War
6% of 1114 decks +6% synergy
Pact of the Serpent
6% of 6647 decks +6% synergy
Utility Artifacts
Staff of the Storyteller
37% of 3594 decks +37% synergy
Andúril, Flame of the West
26% of 6647 decks +26% synergy
Skullclamp
25% of 6647 decks +25% synergy
Swiftfoot Boots
21% of 6647 decks +21% synergy
Wayfarer's Bauble
15% of 6647 decks +14% synergy
Herald's Horn
14% of 6647 decks +14% synergy
Lightning Greaves
14% of 6647 decks +14% synergy
Jet Medallion
14% of 6647 decks +14% synergy
Halo Fountain
13% of 3594 decks +13% synergy
Haystack
12% of 3012 decks +12% synergy
Idol of Oblivion
10% of 6647 decks +10% synergy
Vanquisher's Banner
10% of 6647 decks +10% synergy
Long-Forgotten Gohei
8% of 6647 decks +7% synergy
Robe of Stars
7% of 3594 decks +7% synergy
Bolas's Citadel
7% of 6647 decks +6% synergy
Ashnod's Altar
6% of 6647 decks +6% synergy
Expedition Map
6% of 6647 decks +5% synergy
Banner of Kinship
6% of 3852 decks +5% synergy
The Water Crystal
5% of 369 decks +5% synergy
Contagion Clasp
5% of 6647 decks +5% synergy
Enchantments
Ghostly Prison
35% of 3594 decks +35% synergy
Inspiring Leader
30% of 3594 decks +30% synergy
Flowering of the White Tree
27% of 3594 decks +27% synergy
Anointed Procession
26% of 3594 decks +25% synergy
Phyrexian Arena
25% of 6647 decks +25% synergy
Dismiss into Dream
24% of 1455 decks +24% synergy
Freed from the Real
21% of 1455 decks +21% synergy
Rally the Ranks
21% of 3594 decks +20% synergy
Inexorable Tide
20% of 1455 decks +20% synergy
Cathars' Crusade
17% of 3594 decks +16% synergy
Caretaker's Talent
16% of 2520 decks +16% synergy
Wilderness Reclamation
15% of 1114 decks +15% synergy
Propaganda
15% of 1455 decks +15% synergy
Etchings of the Chosen
15% of 3594 decks +15% synergy
Pemmin's Aura
15% of 1455 decks +15% synergy
Muster the Departed
14% of 2694 decks +14% synergy
Mirari's Wake
14% of 521 decks +14% synergy
Training Grounds
13% of 1455 decks +13% synergy
Cowardice
13% of 1455 decks +13% synergy
Black Market Connections
12% of 6647 decks +12% synergy
Ethereal Absolution
12% of 3594 decks +11% synergy
Unstoppable Plan
11% of 717 decks +11% synergy
Intruder Alarm
11% of 1455 decks +11% synergy
Mystic Remora
11% of 1455 decks +11% synergy
Leyline of the Guildpact
10% of 364 decks +10% synergy
Renewed Solidarity
10% of 1611 decks +10% synergy
Dazzling Theater // Prop Room
10% of 2277 decks +9% synergy
Black Market
9% of 6647 decks +9% synergy
Field of Souls
9% of 3594 decks +9% synergy
Deathreap Ritual
9% of 1114 decks +9% synergy
Tocasia's Welcome
9% of 3594 decks +9% synergy
Court of Grace
9% of 3594 decks +9% synergy
Eaten by Piranhas
8% of 1383 decks +8% synergy
The Kami War
8% of 412 decks +8% synergy
Summoner's Sending
8% of 835 decks +8% synergy
Hardened Scales
7% of 1114 decks +7% synergy
Dawn of a New Age
7% of 3594 decks +7% synergy
Land Tax
7% of 3594 decks +7% synergy
Nest of Scarabs
7% of 6647 decks +7% synergy
Feast of the Victorious Dead
7% of 3594 decks +7% synergy
Hollowmurk Siege
7% of 410 decks +7% synergy
Mortal Combat
7% of 6647 decks +6% synergy
At Knifepoint
7% of 933 decks +6% synergy
Sylvan Library
6% of 1114 decks +6% synergy
Animate Dead
6% of 6647 decks +6% synergy
Promise of Bunrei
6% of 3594 decks +6% synergy
Spirit Bonds
6% of 3594 decks +6% synergy
Blowfly Infestation
6% of 6647 decks +6% synergy
Trouble in Pairs
6% of 3085 decks +6% synergy
Out of Time
5% of 3594 decks +5% synergy
Battles
Invasion of Tolvada
26% of 3594 decks +26% synergy
Invasion of New Capenna
9% of 3594 decks +8% synergy
Planeswalkers
Kaya, Geist Hunter
27% of 3594 decks +27% synergy
Tyvar, Jubilant Brawler
6% of 1114 decks +5% synergy
Kaya, Spirits' Justice
5% of 3114 decks +5% synergy
Elspeth, Storm Slayer
5% of 1247 decks +5% synergy
Utility Lands
Vault of the Archangel
44% of 3594 decks +44% synergy
Bojuka Bog
36% of 6647 decks +36% synergy
Minas Tirith
28% of 3594 decks +28% synergy
Reliquary Tower
23% of 6647 decks +23% synergy
Urborg, Tomb of Yawgmoth
21% of 6647 decks +21% synergy
Cabal Coffers
19% of 6647 decks +18% synergy
Windbrisk Heights
14% of 3594 decks +13% synergy
Rogue's Passage
13% of 6647 decks +13% synergy
Three Tree City
12% of 4797 decks +12% synergy
Boseiju, Who Endures
12% of 1114 decks +12% synergy
Temple of the False God
10% of 6647 decks +9% synergy
Otawara, Soaring City
8% of 1455 decks +8% synergy
Phyrexian Tower
8% of 6647 decks +8% synergy
Minamo, School at Water's Edge
8% of 1455 decks +8% synergy
Cabal Stronghold
8% of 6647 decks +8% synergy
Castle Locthwain
8% of 6647 decks +8% synergy
Eiganjo, Seat of the Empire
8% of 3594 decks +7% synergy
Takenuma, Abandoned Mire
7% of 6647 decks +7% synergy
Mystic Sanctuary
7% of 1455 decks +7% synergy
War Room
7% of 6647 decks +6% synergy
Crypt of Agadeem
6% of 6647 decks +6% synergy
Accursed Duneyard
6% of 3084 decks +6% synergy
Nykthos, Shrine to Nyx
6% of 6647 decks +6% synergy
Witch's Cottage
6% of 6647 decks +6% synergy
Karn's Bastion
6% of 6647 decks +6% synergy
Mortuary Mire
5% of 6647 decks +5% synergy
Ancient Tomb
5% of 6647 decks +5% synergy
Arcane Lighthouse
5% of 6647 decks +5% synergy
Mana Artifacts
Sol Ring
84% of 6647 decks +84% synergy
Arcane Signet
72% of 6647 decks +72% synergy
Orzhov Signet
49% of 3594 decks +49% synergy
Talisman of Hierarchy
40% of 3594 decks +40% synergy
Dimir Signet
31% of 1455 decks +30% synergy
Talisman of Dominance
30% of 1455 decks +30% synergy
Rakdos Signet
24% of 1107 decks +24% synergy
Mind Stone
23% of 6647 decks +23% synergy
Talisman of Indulgence
21% of 1107 decks +21% synergy
Fellwar Stone
19% of 6647 decks +19% synergy
Talisman of Creativity
17% of 655 decks +17% synergy
Commander's Sphere
17% of 6647 decks +17% synergy
Séance Board
17% of 4284 decks +17% synergy
Patchwork Banner
16% of 4745 decks +16% synergy
Izzet Signet
14% of 655 decks +14% synergy
Talisman of Resilience
14% of 1114 decks +14% synergy
Thought Vessel
13% of 6647 decks +13% synergy
Golgari Signet
12% of 1114 decks +12% synergy
Charcoal Diamond
11% of 6647 decks +10% synergy
Talisman of Curiosity
9% of 589 decks +9% synergy
Wand of the Worldsoul
9% of 3594 decks +9% synergy
Boros Signet
9% of 534 decks +8% synergy
Talisman of Conviction
8% of 534 decks +8% synergy
Talisman of Progress
7% of 527 decks +7% synergy
Bounty Board
6% of 5432 decks +6% synergy
Azorius Signet
6% of 527 decks +6% synergy
Marble Diamond
6% of 3594 decks +6% synergy
Chromatic Lantern
6% of 6647 decks +6% synergy
Bandit's Haul
5% of 5455 decks +5% synergy
Everflowing Chalice
5% of 6647 decks +5% synergy
Lands
Command Tower
66% of 6647 decks +66% synergy
Isolated Chapel
56% of 3594 decks +55% synergy
Tainted Field
45% of 3594 decks +45% synergy
Caves of Koilos
44% of 3594 decks +44% synergy
Shineshadow Snarl
40% of 3594 decks +40% synergy
Godless Shrine
40% of 3594 decks +39% synergy
Orzhov Basilica
38% of 3594 decks +38% synergy
Sunken Hollow
37% of 1455 decks +36% synergy
Vault of Champions
35% of 3594 decks +35% synergy
Temple of Silence
34% of 3594 decks +34% synergy
Overgrown Tomb
32% of 1114 decks +32% synergy
Path of Ancestry
32% of 6647 decks +32% synergy
Fetid Heath
32% of 3594 decks +32% synergy
Watery Grave
31% of 1455 decks +30% synergy
Opulent Palace
31% of 589 decks +30% synergy
Drowned Catacomb
30% of 1455 decks +29% synergy
Woodland Cemetery
30% of 1114 decks +29% synergy
Smoldering Marsh
29% of 1107 decks +29% synergy
Temple Garden
29% of 521 decks +29% synergy
The World Tree
28% of 412 decks +28% synergy
Shattered Sanctum
28% of 3594 decks +28% synergy
Breeding Pool
28% of 589 decks +28% synergy
Stomping Ground
26% of 492 decks +26% synergy
Steam Vents
26% of 655 decks +26% synergy
Blood Crypt
26% of 1107 decks +26% synergy
Exotic Orchard
26% of 6647 decks +25% synergy
Crumbling Necropolis
25% of 655 decks +25% synergy
Llanowar Wastes
25% of 1114 decks +25% synergy
Sandsteppe Citadel
25% of 521 decks +24% synergy
Dragonskull Summit
24% of 1107 decks +24% synergy
Sacred Foundry
24% of 534 decks +24% synergy
Hallowed Fountain
24% of 527 decks +24% synergy
Myriad Landscape
23% of 6647 decks +23% synergy
Shipwreck Marsh
23% of 1455 decks +22% synergy
Zagoth Triome
22% of 589 decks +22% synergy
Dimir Aqueduct
22% of 1455 decks +21% synergy
Nomad Outpost
21% of 534 decks +21% synergy
Indatha Triome
21% of 521 decks +21% synergy
Evolving Wilds
21% of 6647 decks +20% synergy
Arcane Sanctum
20% of 527 decks +20% synergy
Undergrowth Stadium
20% of 1114 decks +20% synergy
Brightclimb Pathway
20% of 3594 decks +20% synergy
Temple of Deceit
19% of 1455 decks +19% synergy
Ketria Triome
19% of 419 decks +19% synergy
Morphic Pool
19% of 1455 decks +19% synergy
Tainted Wood
19% of 1114 decks +18% synergy
Golgari Rot Farm
19% of 1114 decks +18% synergy
Scoured Barrens
19% of 3594 decks +18% synergy
Underground River
18% of 1455 decks +18% synergy
Xander's Lounge
18% of 655 decks +18% synergy