Extus, Oriq Overlord (Commander) - Upgraded Spellslinger

Ethan Coover
Oct 6, 2025
The Best Warlock Combos in Commander
We're getting into spooky season, so let's churn up a bubbling brew by looking at the best Warlock combo cards in Commander.
Deck Filters
Cardsphere
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Silverquill, the Disputant
47%inclusion7 decks15 decks
46%synergy
Aziza, Mage Tower Captain
36%inclusion5 decks14 decks
35%synergy
Prismari Pianist
33%inclusion5 decks15 decks
33%synergy
Emeritus of Woe
18%inclusion2 decks11 decks
15%synergy
Turbulent Moor
13%inclusion2 decks15 decks
12%synergy
High Synergy Cards
Sedgemoor Witch
81%inclusion25 decks31 decks
80%synergy
Monastery Mentor
65%inclusion20 decks31 decks
64%synergy
Young Pyromancer
65%inclusion20 decks31 decks
63%synergy
Plumb the Forbidden
65%inclusion20 decks31 decks
61%synergy
Village Rites
65%inclusion20 decks31 decks
53%synergy
Corrupted Conviction
48%inclusion15 decks31 decks
44%synergy
Body Count
42%inclusion13 decks31 decks
41%synergy
Deadly Dispute
61%inclusion19 decks31 decks
38%synergy
Fury Storm
39%inclusion12 decks31 decks
38%synergy
Mayhem Devil
45%inclusion14 decks31 decks
37%synergy
Top Cards
Pitiless Plunderer
55%inclusion17 decks31 decks
36%synergy
Skullclamp
52%inclusion16 decks31 decks
23%synergy
Swords to Plowshares
42%inclusion13 decks31 decks
-20%synergy
Inkshield
42%inclusion13 decks31 decks
34%synergy
Mahadi, Emporium Master
39%inclusion12 decks31 decks
30%synergy
Morbid Opportunist
39%inclusion12 decks31 decks
20%synergy
Secure the Wastes
39%inclusion12 decks31 decks
32%synergy
Call the Coppercoats
39%inclusion12 decks31 decks
34%synergy
Anointed Procession
35%inclusion11 decks31 decks
23%synergy
Blood for the Blood God!
35%inclusion11 decks31 decks
34%synergy
Game Changers
Jeska's Will
26%inclusion8 decks31 decks
16%synergy
Smothering Tithe
19%inclusion6 decks31 decks
-6%synergy
Demonic Tutor
16%inclusion5 decks31 decks
-3%synergy
Gamble
13%inclusion4 decks31 decks
6%synergy
Vampiric Tutor
13%inclusion4 decks31 decks
-1%synergy
Underworld Breach
10%inclusion3 decks31 decks
5%synergy
Field of the Dead
10%inclusion3 decks31 decks
9%synergy
Teferi's Protection
6.5%inclusion2 decks31 decks
-13%synergy
Bolas's Citadel
6.5%inclusion2 decks31 decks
-1%synergy
Enlightened Tutor
6.5%inclusion2 decks31 decks
-6%synergy
Creatures
Pinnacle Monk
35%inclusion11 decks31 decks
32%synergy
Storm-Kiln Artist
35%inclusion11 decks31 decks
34%synergy
Mondrak, Glory Dominus
35%inclusion11 decks31 decks
24%synergy
Teysa Karlov
32%inclusion10 decks31 decks
25%synergy
Dualcaster Mage
29%inclusion9 decks31 decks
26%synergy
Flamekin Herald
26%inclusion8 decks31 decks
25%synergy
Charismatic Conqueror
26%inclusion8 decks31 decks
15%synergy
Cruel Celebrant
26%inclusion8 decks31 decks
13%synergy
Zulaport Cutthroat
26%inclusion8 decks31 decks
16%synergy
Elas il-Kor, Sadistic Pilgrim
26%inclusion8 decks31 decks
15%synergy
Marionette Apprentice
26%inclusion8 decks31 decks
20%synergy
Witch Enchanter
23%inclusion7 decks31 decks
16%synergy
Mirkwood Bats
23%inclusion7 decks31 decks
6%synergy
Thalisse, Reverent Medium
23%inclusion7 decks31 decks
17%synergy
Lagomos, Hand of Hatred
19%inclusion6 decks31 decks
17%synergy
Blood Artist
19%inclusion6 decks31 decks
1%synergy
Cathar Commando
19%inclusion6 decks31 decks
18%synergy
Mogg War Marshal
19%inclusion6 decks31 decks
19%synergy
Welcoming Vampire
19%inclusion6 decks31 decks
7%synergy
Elenda, the Dusk Rose
19%inclusion6 decks31 decks
9%synergy
Exalted Sunborn
18%inclusion5 decks28 decks
13%synergy
Solemn Simulacrum
16%inclusion5 decks31 decks
3%synergy
Dragon's Rage Channeler
16%inclusion5 decks31 decks
14%synergy
Leonin Lightscribe
16%inclusion5 decks31 decks
16%synergy
Ardent Elementalist
16%inclusion5 decks31 decks
16%synergy
Enduring Innocence
16%inclusion5 decks31 decks
13%synergy
Esper Sentinel
16%inclusion5 decks31 decks
-2%synergy
Street Wraith
16%inclusion5 decks31 decks
16%synergy
Accursed Marauder
16%inclusion5 decks31 decks
13%synergy
Defacing Duskmage
13%inclusion2 decks15 decks
13%synergy
Anim Pakal, Thousandth Moon
13%inclusion4 decks31 decks
0%synergy
Drannith Healer
13%inclusion4 decks31 decks
13%synergy
Agate Instigator
13%inclusion4 decks31 decks
10%synergy
Flourishing Fox
13%inclusion4 decks31 decks
13%synergy
Urabrask
13%inclusion4 decks31 decks
13%synergy
Imperial Recruiter
13%inclusion4 decks31 decks
8%synergy
Archfiend of Ifnir
13%inclusion4 decks31 decks
13%synergy
Impulsive Pilferer
13%inclusion4 decks31 decks
10%synergy
Doomed Traveler
13%inclusion4 decks31 decks
12%synergy
Guttersnipe
13%inclusion4 decks31 decks
13%synergy
Birgi, God of Storytelling
13%inclusion4 decks31 decks
11%synergy
Judith, Carnage Connoisseur
13%inclusion4 decks31 decks
13%synergy
Dauthi Voidwalker
13%inclusion4 decks31 decks
9%synergy
Bitterbloom Bearer
12%inclusion3 decks26 decks
10%synergy
Zurgo Stormrender
10%inclusion3 decks30 decks
1%synergy
Voice of Victory
10%inclusion3 decks30 decks
-7%synergy
Sengir Autocrat
10%inclusion3 decks31 decks
9%synergy
Troll of Khazad-dûm
10%inclusion3 decks31 decks
9%synergy
Kambal, Profiteering Mayor
10%inclusion3 decks31 decks
0%synergy
Adeline, Resplendent Cathar
10%inclusion3 decks31 decks
-7%synergy
Instants
Afterlife Insurance
32%inclusion10 decks31 decks
31%synergy
Grand Crescendo
32%inclusion10 decks31 decks
26%synergy
Return the Favor
26%inclusion8 decks31 decks
24%synergy
Anguished Unmaking
26%inclusion8 decks31 decks
-8%synergy
Path to Exile
26%inclusion8 decks31 decks
-21%synergy
Dark Ritual
23%inclusion7 decks31 decks
6%synergy
Despark
23%inclusion7 decks31 decks
9%synergy
Rootborn Defenses
19%inclusion6 decks31 decks
18%synergy
Thrill of Possibility
19%inclusion6 decks31 decks
12%synergy
Entomb
19%inclusion6 decks31 decks
13%synergy
Rakdos Charm
19%inclusion6 decks31 decks
10%synergy
Wear // Tear
19%inclusion6 decks31 decks
8%synergy
Saw in Half
19%inclusion6 decks31 decks
16%synergy
Valakut Awakening
19%inclusion6 decks31 decks
16%synergy
Transpose
17%inclusion5 decks30 decks
17%synergy
Fell the Profane
16%inclusion5 decks31 decks
10%synergy
Chaos Warp
16%inclusion5 decks31 decks
0%synergy
Fanatical Offering
16%inclusion5 decks31 decks
15%synergy
Seething Song
16%inclusion5 decks31 decks
15%synergy
Malakir Rebirth
16%inclusion5 decks31 decks
11%synergy
Flare of Duplication
16%inclusion5 decks31 decks
15%synergy
Will of the Mardu
13%inclusion4 decks30 decks
3%synergy
Faithless Salvaging
13%inclusion4 decks31 decks
13%synergy
Ephemerate
13%inclusion4 decks31 decks
8%synergy
Raise the Alarm
13%inclusion4 decks31 decks
12%synergy
Cabal Ritual
13%inclusion4 decks31 decks
10%synergy
Culling the Weak
13%inclusion4 decks31 decks
9%synergy
Crackling Doom
13%inclusion4 decks31 decks
-4%synergy
Abrade
13%inclusion4 decks31 decks
7%synergy
Generous Gift
13%inclusion4 decks31 decks
-5%synergy
Continue?
10%inclusion2 decks20 decks
9%synergy
Rise of the Dread Marn
10%inclusion3 decks31 decks
9%synergy
Reiterate
10%inclusion3 decks31 decks
9%synergy
Tibalt's Trickery
10%inclusion3 decks31 decks
6%synergy
Clever Concealment
10%inclusion3 decks31 decks
6%synergy
Burnt Offering
10%inclusion3 decks31 decks
7%synergy
Increasing Vengeance
10%inclusion3 decks31 decks
9%synergy
Demand Answers
10%inclusion3 decks31 decks
5%synergy
Sejiri Shelter
10%inclusion3 decks31 decks
7%synergy
Mortify
10%inclusion3 decks31 decks
-6%synergy
Reverberate
10%inclusion3 decks31 decks
9%synergy
Rabid Attack
9.1%inclusion1 decks11 decks
9%synergy
Flashback
7.1%inclusion1 decks14 decks
6%synergy
Frontline Rush
6.7%inclusion2 decks30 decks
5%synergy
Fire Covenant
6.5%inclusion2 decks31 decks
5%synergy
Sheoldred's Edict
6.5%inclusion2 decks31 decks
5%synergy
Boros Charm
6.5%inclusion2 decks31 decks
-23%synergy
Pile On
6.5%inclusion2 decks31 decks
6%synergy
Lightning Bolt
6.5%inclusion2 decks31 decks
3%synergy
Blossoming Calm
6.5%inclusion2 decks31 decks
6%synergy
Sorceries
Faithless Looting
29%inclusion9 decks31 decks
14%synergy
Lingering Souls
26%inclusion8 decks31 decks
24%synergy
Sevinne's Reclamation
26%inclusion8 decks31 decks
18%synergy
Victimize
26%inclusion8 decks31 decks
18%synergy
Martial Coup
23%inclusion7 decks31 decks
18%synergy
Song of Totentanz
23%inclusion7 decks31 decks
21%synergy
Blot Out the Sky
23%inclusion7 decks31 decks
22%synergy
Night's Whisper
23%inclusion7 decks31 decks
9%synergy
Diabolic Intent
19%inclusion6 decks31 decks
10%synergy
Unearth
19%inclusion6 decks31 decks
17%synergy
Sram's Expertise
19%inclusion6 decks31 decks
19%synergy
Mythos of Snapdax
19%inclusion6 decks31 decks
14%synergy
Infernal Plunge
16%inclusion5 decks31 decks
15%synergy
Unmarked Grave
16%inclusion5 decks31 decks
15%synergy
Past in Flames
16%inclusion5 decks31 decks
16%synergy
Resentful Revelation
13%inclusion4 decks30 decks
13%synergy
Cathartic Reunion
13%inclusion4 decks31 decks
9%synergy
Buried Alive
13%inclusion4 decks31 decks
7%synergy
White Sun's Twilight
13%inclusion4 decks31 decks
12%synergy
Ruinous Ultimatum
13%inclusion4 decks31 decks
-26%synergy
Blasphemous Edict
13%inclusion4 decks31 decks
9%synergy
Ghired's Belligerence
13%inclusion4 decks31 decks
13%synergy
Rite of Oblivion
13%inclusion4 decks31 decks
11%synergy
Lively Dirge
10%inclusion3 decks31 decks
8%synergy
Agadeem's Awakening
10%inclusion3 decks31 decks
7%synergy
Hour of Reckoning
10%inclusion3 decks31 decks
3%synergy
Skull Storm
10%inclusion3 decks31 decks
10%synergy
Seize the Spotlight
10%inclusion3 decks31 decks
6%synergy
Bonus Round
10%inclusion3 decks31 decks
10%synergy
Dark Petition
10%inclusion3 decks31 decks
9%synergy
Ransack the Lab
10%inclusion3 decks31 decks
10%synergy
Reanimate
10%inclusion3 decks31 decks
-8%synergy
Mana Geyser
10%inclusion3 decks31 decks
9%synergy
Damn
10%inclusion3 decks31 decks
-8%synergy
Bloodsoaked Insight
10%inclusion3 decks31 decks
8%synergy
Tempt with Vengeance
10%inclusion3 decks31 decks
7%synergy
Sign in Blood
10%inclusion3 decks31 decks
2%synergy
Hop to It
10%inclusion3 decks31 decks
9%synergy
Haze of Rage
10%inclusion3 decks31 decks
10%synergy
Pursue the Past
9.1%inclusion1 decks11 decks
8%synergy
Artistic Process
7.1%inclusion1 decks14 decks
7%synergy
Circle of Power
6.7%inclusion2 decks30 decks
7%synergy
Requisition Raid
6.5%inclusion2 decks31 decks
4%synergy
Empyrial Storm
6.5%inclusion2 decks31 decks
6%synergy
Wheel of Misfortune
6.5%inclusion2 decks31 decks
5%synergy
Wake the Reflections
6.5%inclusion2 decks31 decks
6%synergy
Dismantling Wave
6.5%inclusion2 decks31 decks
6%synergy
Profane Tutor
6.5%inclusion2 decks31 decks
5%synergy
Diabolic Tutor
6.5%inclusion2 decks31 decks
0%synergy
Mizzix's Mastery
6.5%inclusion2 decks31 decks
6%synergy
Utility Artifacts
Primal Amulet
26%inclusion8 decks31 decks
26%synergy
Idol of Oblivion
23%inclusion7 decks31 decks
9%synergy
Ashnod's Altar
19%inclusion6 decks31 decks
11%synergy
Monument to Endurance
10%inclusion3 decks31 decks
9%synergy
Swiftfoot Boots
10%inclusion3 decks31 decks
-22%synergy
Wayfarer's Bauble
6.5%inclusion2 decks31 decks
-2%synergy
Twinning Staff
6.5%inclusion2 decks31 decks
6%synergy
Urabrask's Forge
6.5%inclusion2 decks31 decks
5%synergy
Sunforger
6.5%inclusion2 decks31 decks
3%synergy
Archaeomancer's Map
6.5%inclusion2 decks31 decks
5%synergy
Enchantments
Bastion of Remembrance
23%inclusion7 decks31 decks
9%synergy
Caretaker's Talent
23%inclusion7 decks31 decks
17%synergy
Black Market Connections
23%inclusion7 decks31 decks
7%synergy
Muster the Departed
23%inclusion7 decks31 decks
22%synergy
Artist's Talent
19%inclusion6 decks31 decks
19%synergy
Windcrag Siege
17%inclusion5 decks30 decks
-2%synergy
Promise of Aclazotz
16%inclusion5 decks31 decks
15%synergy
Assemble the Legion
16%inclusion5 decks31 decks
10%synergy
Bitterblossom
16%inclusion5 decks31 decks
13%synergy
Obsessive Pursuit
15%inclusion4 decks26 decks
14%synergy
Determined Iteration
13%inclusion4 decks31 decks
12%synergy
Firebender Ascension
12%inclusion3 decks26 decks
4%synergy
Teval's Judgment
10%inclusion3 decks30 decks
8%synergy
Endless Foot Assault
10%inclusion2 decks20 decks
6%synergy
Skrelv's Hive
10%inclusion3 decks31 decks
8%synergy
Tocasia's Welcome
10%inclusion3 decks31 decks
4%synergy
Astral Slide
10%inclusion3 decks31 decks
10%synergy
Land Tax
10%inclusion3 decks31 decks
4%synergy
Astral Drift
10%inclusion3 decks31 decks
10%synergy
Song of the Worldsoul
10%inclusion3 decks31 decks
9%synergy
Prosperous Partnership
10%inclusion3 decks31 decks
8%synergy
The Meathook Massacre
6.5%inclusion2 decks31 decks
1%synergy
Dual Casting
6.5%inclusion2 decks31 decks
6%synergy
Case of the Stashed Skeleton
6.5%inclusion2 decks31 decks
6%synergy
Double Vision
6.5%inclusion2 decks31 decks
6%synergy
Glasswing Grace
6.5%inclusion2 decks31 decks
5%synergy
Fable of the Mirror-Breaker
6.5%inclusion2 decks31 decks
4%synergy
Goblin Bombardment
6.5%inclusion2 decks31 decks
-3%synergy
Impact Tremors
6.5%inclusion2 decks31 decks
-9%synergy
Planeswalkers
Elspeth, Storm Slayer
20%inclusion6 decks30 decks
10%synergy
Elspeth, Sun's Champion
16%inclusion5 decks31 decks
12%synergy
Chandra, Hope's Beacon
16%inclusion5 decks31 decks
16%synergy
Professor Onyx
16%inclusion5 decks31 decks
16%synergy
Tevesh Szat, Doom of Fools
6.5%inclusion2 decks31 decks
6%synergy
Liliana, Dreadhorde General
6.5%inclusion2 decks31 decks
5%synergy
Lolth, Spider Queen
6.5%inclusion2 decks31 decks
6%synergy
Kaya, Geist Hunter
6.5%inclusion2 decks31 decks
2%synergy
Utility Lands
Bojuka Bog
32%inclusion10 decks31 decks
1%synergy
Phyrexian Tower
29%inclusion9 decks31 decks
19%synergy
Lindblum, Industrial Regency
23%inclusion7 decks30 decks
22%synergy
Midgar, City of Mako
23%inclusion7 decks30 decks
20%synergy
Takenuma, Abandoned Mire
23%inclusion7 decks31 decks
15%synergy
Kher Keep
16%inclusion5 decks31 decks
14%synergy
Command Beacon
16%inclusion5 decks31 decks
11%synergy
Sokenzan, Crucible of Defiance
16%inclusion5 decks31 decks
12%synergy
Westvale Abbey
13%inclusion4 decks31 decks
10%synergy
Urborg, Tomb of Yawgmoth
13%inclusion4 decks31 decks
0%synergy
Vault of the Archangel
13%inclusion4 decks31 decks
-10%synergy
Castle Ardenvale
13%inclusion4 decks31 decks
8%synergy
Spymaster's Vault
10%inclusion3 decks31 decks
8%synergy
Castle Locthwain
10%inclusion3 decks31 decks
7%synergy
Dalkovan Encampment
6.7%inclusion2 decks30 decks
-1%synergy
Great Hall of the Biblioplex
6.7%inclusion1 decks15 decks
7%synergy
Shizo, Death's Storehouse
6.5%inclusion2 decks31 decks
-1%synergy
Barren Moor
6.5%inclusion2 decks31 decks
6%synergy
Molten Slagheap
6.5%inclusion2 decks31 decks
6%synergy
Windbrisk Heights
6.5%inclusion2 decks31 decks
-4%synergy
Geier Reach Sanitarium
6.5%inclusion2 decks31 decks
4%synergy
Eiganjo, Seat of the Empire
6.5%inclusion2 decks31 decks
0%synergy
Secluded Steppe
6.5%inclusion2 decks31 decks
6%synergy
Restless Bivouac
6.5%inclusion2 decks31 decks
5%synergy
Strip Mine
6.5%inclusion2 decks31 decks
5%synergy
Reliquary Tower
6.5%inclusion2 decks31 decks
-9%synergy
Mana Artifacts
Arcane Signet
87%inclusion27 decks31 decks
1%synergy
Sol Ring
71%inclusion22 decks31 decks
-18%synergy
Talisman of Indulgence
29%inclusion9 decks31 decks
-8%synergy
Talisman of Hierarchy
26%inclusion8 decks31 decks
-15%synergy
Talisman of Conviction
23%inclusion7 decks31 decks
-19%synergy
Rakdos Signet
19%inclusion6 decks31 decks
-10%synergy
Fellwar Stone
19%inclusion6 decks31 decks
-9%synergy
Pyromancer's Goggles
19%inclusion6 decks31 decks
19%synergy
Orzhov Signet
16%inclusion5 decks31 decks
-15%synergy
Boros Signet
13%inclusion4 decks31 decks
-15%synergy
Séance Board
13%inclusion4 decks31 decks
13%synergy
Tablet of Discovery
9.1%inclusion1 decks11 decks
9%synergy
Commander's Sphere
6.5%inclusion2 decks31 decks
-8%synergy
Crowded Crypt
6.5%inclusion2 decks31 decks
6%synergy
Wand of the Worldsoul
6.5%inclusion2 decks31 decks
6%synergy
Chromatic Lantern
6.5%inclusion2 decks31 decks
-5%synergy
Lands
Swamp
97%inclusion30 decks31 decks
2%synergy
Mountain
97%inclusion30 decks31 decks
3%synergy
Command Tower
94%inclusion29 decks31 decks
1%synergy
Plains
94%inclusion29 decks31 decks
-2%synergy
Dragonskull Summit
68%inclusion21 decks31 decks
16%synergy
Godless Shrine
61%inclusion19 decks31 decks
14%synergy
Sacred Foundry
58%inclusion18 decks31 decks
13%synergy
Blood Crypt
58%inclusion18 decks31 decks
14%synergy
Savai Triome
55%inclusion17 decks31 decks
17%synergy
Nomad Outpost
52%inclusion16 decks31 decks
-7%synergy
Isolated Chapel
52%inclusion16 decks31 decks
-2%synergy
Spectator Seating
52%inclusion16 decks31 decks
20%synergy
Clifftop Retreat
52%inclusion16 decks31 decks
0%synergy
Caves of Koilos
48%inclusion15 decks31 decks
9%synergy
Luxury Suite
45%inclusion14 decks31 decks
14%synergy
Marsh Flats
45%inclusion14 decks31 decks
14%synergy
Arid Mesa
42%inclusion13 decks31 decks
11%synergy
Sulfurous Springs
42%inclusion13 decks31 decks
14%synergy
Exotic Orchard
39%inclusion12 decks31 decks
-14%synergy
Smoldering Marsh
39%inclusion12 decks31 decks
2%synergy
Battlefield Forge
39%inclusion12 decks31 decks
-2%synergy
Vault of Champions
35%inclusion11 decks31 decks
3%synergy
Pinnacle Monk
35%inclusion11 decks31 decks
32%synergy
Bloodstained Mire
35%inclusion11 decks31 decks
3%synergy
Haunted Ridge
32%inclusion10 decks31 decks
12%synergy
Sundown Pass
29%inclusion9 decks31 decks
9%synergy
Shattered Sanctum
29%inclusion9 decks31 decks
5%synergy
Raucous Theater
26%inclusion8 decks31 decks
16%synergy
Witch Enchanter
23%inclusion7 decks31 decks
16%synergy
Shadowy Backstreet
23%inclusion7 decks31 decks
12%synergy
Fetid Heath
23%inclusion7 decks31 decks
2%synergy
Graven Cairns
23%inclusion7 decks31 decks
11%synergy
Brightclimb Pathway
19%inclusion6 decks31 decks
11%synergy
Rugged Prairie
19%inclusion6 decks31 decks
2%synergy
Foreboding Ruins
19%inclusion6 decks31 decks
8%synergy
Valakut Awakening
19%inclusion6 decks31 decks
16%synergy
Rakdos Carnarium
16%inclusion5 decks31 decks
4%synergy
Fell the Profane
16%inclusion5 decks31 decks
10%synergy
Blackcleave Cliffs
16%inclusion5 decks31 decks
10%synergy
Shattered Landscape
16%inclusion5 decks31 decks
-3%synergy
Blazemire Verge
16%inclusion5 decks31 decks
4%synergy
Malakir Rebirth
16%inclusion5 decks31 decks
11%synergy
Orzhov Basilica
16%inclusion5 decks31 decks
2%synergy
Path of Ancestry
16%inclusion5 decks31 decks
-22%synergy
Blightstep Pathway
16%inclusion5 decks31 decks
8%synergy
Elegant Parlor
16%inclusion5 decks31 decks
6%synergy
Radiant Summit
14%inclusion4 decks28 decks
11%synergy
Eclipsed Steppe
13%inclusion2 decks15 decks
12%synergy
Turbulent Steppe
13%inclusion2 decks15 decks
12%synergy
Prismatic Vista
13%inclusion4 decks31 decks
9%synergy