Atreus, Impulsive Son // Kratos, Stoic Father (Commander) - Expensive Optimized

Atreus, Impulsive Son // Kratos, Stoic Father
Rank #514
12decks
Background image for Kratos and Atreus Commander Deck Tech
Cas Hinds
Oct 13, 2025
Kratos and Atreus Commander Deck Tech
Wanna build a flavorful Commander deck? This Kratos and Atreus deck shows the power of a father and son overcoming the tyranny of the gods.
Deck Filters
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Katara, Waterbending Master
75%inclusion9 decks12 decks
72%synergy
Aang, Airbending Master
25%inclusion3 decks12 decks
24%synergy
The Last Agni Kai
20%inclusion2 decks10 decks
19%synergy
Zuko, Firebending Master
11%inclusion1 decks9 decks
9%synergy
Wan Shi Tong, Librarian
10%inclusion1 decks10 decks
8%synergy
High Synergy Cards
Birgi, God of Storytelling
83%inclusion10 decks12 decks
78%synergy
Otharri, Suns' Glory
75%inclusion9 decks12 decks
73%synergy
Iroas, God of Victory
75%inclusion9 decks12 decks
73%synergy
Minamo, School at Water's Edge
75%inclusion9 decks12 decks
72%synergy
Esper Sentinel
92%inclusion11 decks12 decks
72%synergy
Deflecting Swat
83%inclusion10 decks12 decks
70%synergy
The Reaver Cleaver
75%inclusion9 decks12 decks
69%synergy
Aggravated Assault
67%inclusion8 decks12 decks
64%synergy
Urza's Saga
67%inclusion8 decks12 decks
58%synergy
Heliod, Sun-Crowned
58%inclusion7 decks12 decks
57%synergy
Top Cards
Swords to Plowshares
75%inclusion9 decks12 decks
7%synergy
Aurelia, the Warleader
58%inclusion7 decks12 decks
54%synergy
Roaming Throne
58%inclusion7 decks12 decks
53%synergy
Ragavan, Nimble Pilferer
58%inclusion7 decks12 decks
54%synergy
Walking Ballista
58%inclusion7 decks12 decks
55%synergy
Mystic Remora
58%inclusion7 decks12 decks
46%synergy
Training Grounds
58%inclusion7 decks12 decks
54%synergy
Teferi's Protection
50%inclusion6 decks12 decks
35%synergy
Ilharg, the Raze-Boar
50%inclusion6 decks12 decks
48%synergy
Swan Song
50%inclusion6 decks12 decks
34%synergy
Game Changers
Rhystic Study
100%inclusion12 decks12 decks
80%synergy
Chrome Mox
100%inclusion12 decks12 decks
95%synergy
Mox Diamond
100%inclusion12 decks12 decks
96%synergy
The One Ring
92%inclusion11 decks12 decks
84%synergy
Ancient Tomb
83%inclusion10 decks12 decks
76%synergy
Smothering Tithe
75%inclusion9 decks12 decks
55%synergy
Enlightened Tutor
75%inclusion9 decks12 decks
60%synergy
Jeska's Will
67%inclusion8 decks12 decks
52%synergy
Fierce Guardianship
67%inclusion8 decks12 decks
51%synergy
Cyclonic Rift
67%inclusion8 decks12 decks
48%synergy
Creatures
The Locust God
50%inclusion6 decks12 decks
44%synergy
Purphoros, God of the Forge
42%inclusion5 decks12 decks
37%synergy
Sage of Hours
42%inclusion5 decks12 decks
41%synergy
Zirda, the Dawnwaker
42%inclusion5 decks12 decks
38%synergy
Ojer Axonil, Deepest Might
42%inclusion5 decks12 decks
40%synergy
Keranos, God of Storms
33%inclusion4 decks12 decks
32%synergy
Djeru and Hazoret
33%inclusion4 decks12 decks
32%synergy
Pollywog Prodigy
33%inclusion4 decks12 decks
28%synergy
Thassa, God of the Sea
33%inclusion4 decks12 decks
32%synergy
Kalemne, Disciple of Iroas
33%inclusion4 decks12 decks
32%synergy
Unsettled Mariner
33%inclusion4 decks12 decks
32%synergy
Taurean Mauler
33%inclusion4 decks12 decks
32%synergy
Patrolling Peacemaker
33%inclusion4 decks12 decks
16%synergy
Kratos, God of War
33%inclusion4 decks12 decks
29%synergy
Grand Abolisher
33%inclusion4 decks12 decks
26%synergy
Anger
33%inclusion4 decks12 decks
31%synergy
Thassa's Oracle
25%inclusion3 decks12 decks
23%synergy
Flux Channeler
25%inclusion3 decks12 decks
18%synergy
Valley Floodcaller
25%inclusion3 decks12 decks
23%synergy
Ranger-Captain of Eos
25%inclusion3 decks12 decks
22%synergy
Metastatic Evangel
17%inclusion2 decks12 decks
14%synergy
Alrund, God of the Cosmos
17%inclusion2 decks12 decks
16%synergy
God-Eternal Oketra
17%inclusion2 decks12 decks
15%synergy
God-Eternal Kefnet
17%inclusion2 decks12 decks
16%synergy
Surtr, Fiery Jötun
17%inclusion2 decks12 decks
15%synergy
Ancient Copper Dragon
17%inclusion2 decks12 decks
15%synergy
Reidane, God of the Worthy
17%inclusion2 decks12 decks
16%synergy
Mother of Runes
17%inclusion2 decks12 decks
12%synergy
Spark Double
17%inclusion2 decks12 decks
10%synergy
Purphoros, Bronze-Blooded
17%inclusion2 decks12 decks
15%synergy
Faerie Mastermind
17%inclusion2 decks12 decks
11%synergy
Amoeboid Changeling
17%inclusion2 decks12 decks
16%synergy
Norn's Choirmaster
17%inclusion2 decks12 decks
15%synergy
Heliod, the Radiant Dawn
17%inclusion2 decks12 decks
15%synergy
Gilded Drake
17%inclusion2 decks12 decks
15%synergy
Kilo, Apogee Mind
17%inclusion2 decks12 decks
6%synergy
Voice of Victory
17%inclusion2 decks12 decks
12%synergy
Lae'zel, Vlaakith's Champion
17%inclusion2 decks12 decks
11%synergy
Tataru Taru
17%inclusion2 decks12 decks
16%synergy
Professional Face-Breaker
8.3%inclusion1 decks12 decks
0%synergy
Scourge of the Throne
8.3%inclusion1 decks12 decks
8%synergy
Archivist of Oghma
8.3%inclusion1 decks12 decks
5%synergy
Dragon's Rage Channeler
8.3%inclusion1 decks12 decks
5%synergy
Marvin, Murderous Mimic
8.3%inclusion1 decks12 decks
8%synergy
Serra Ascendant
8.3%inclusion1 decks12 decks
6%synergy
High Fae Trickster
8.3%inclusion1 decks12 decks
7%synergy
Twinflame Tyrant
8.3%inclusion1 decks12 decks
7%synergy
Niv-Mizzet, Parun
8.3%inclusion1 decks12 decks
5%synergy
Herald of Secret Streams
8.3%inclusion1 decks12 decks
6%synergy
Phyrexian Metamorph
8.3%inclusion1 decks12 decks
1%synergy
Instants
Path to Exile
50%inclusion6 decks12 decks
1%synergy
An Offer You Can't Refuse
42%inclusion5 decks12 decks
22%synergy
Brain Freeze
42%inclusion5 decks12 decks
37%synergy
Flawless Maneuver
42%inclusion5 decks12 decks
30%synergy
Force of Will
42%inclusion5 decks12 decks
35%synergy
Sink into Stupor
42%inclusion5 decks12 decks
32%synergy
Force of Negation
42%inclusion5 decks12 decks
36%synergy
Akroma's Will
42%inclusion5 decks12 decks
30%synergy
Dramatic Reversal
33%inclusion4 decks12 decks
29%synergy
Mystical Tutor
33%inclusion4 decks12 decks
22%synergy
Dovin's Veto
25%inclusion3 decks12 decks
7%synergy
Silence
25%inclusion3 decks12 decks
19%synergy
Savage Beating
25%inclusion3 decks12 decks
24%synergy
Mental Misstep
17%inclusion2 decks12 decks
13%synergy
Boros Charm
17%inclusion2 decks12 decks
-4%synergy
Mindbreak Trap
17%inclusion2 decks12 decks
14%synergy
Stroke of Midnight
17%inclusion2 decks12 decks
7%synergy
Legion Leadership
17%inclusion2 decks12 decks
10%synergy
Red Elemental Blast
17%inclusion2 decks12 decks
14%synergy
Borne Upon a Wind
17%inclusion2 decks12 decks
14%synergy
Pact of Negation
17%inclusion2 decks12 decks
13%synergy
Generous Gift
17%inclusion2 decks12 decks
-6%synergy
Flusterstorm
17%inclusion2 decks12 decks
12%synergy
Into the Flood Maw
17%inclusion2 decks12 decks
14%synergy
Pongify
8.3%inclusion1 decks12 decks
1%synergy
Chaos Warp
8.3%inclusion1 decks12 decks
-14%synergy
Rapid Hybridization
8.3%inclusion1 decks12 decks
2%synergy
And They Shall Know No Fear
8.3%inclusion1 decks12 decks
8%synergy
Muddle the Mixture
8.3%inclusion1 decks12 decks
5%synergy
Frantic Search
8.3%inclusion1 decks12 decks
-7%synergy
Untimely Malfunction
8.3%inclusion1 decks12 decks
5%synergy
Experimental Augury
8.3%inclusion1 decks12 decks
2%synergy
Return to Dust
8.3%inclusion1 decks12 decks
7%synergy
Expedite
8.3%inclusion1 decks12 decks
4%synergy
Chain of Vapor
8.3%inclusion1 decks12 decks
6%synergy
Intuition
8.3%inclusion1 decks12 decks
6%synergy
Desperate Ritual
8.3%inclusion1 decks12 decks
7%synergy
Brainstorm
8.3%inclusion1 decks12 decks
-12%synergy
Dawn's Truce
8.3%inclusion1 decks12 decks
1%synergy
Stubborn Denial
8.3%inclusion1 decks12 decks
6%synergy
Mana Drain
8.3%inclusion1 decks12 decks
-2%synergy
Ripples of Potential
8.3%inclusion1 decks12 decks
1%synergy
Pyretic Ritual
8.3%inclusion1 decks12 decks
7%synergy
Final Fortune
8.3%inclusion1 decks12 decks
7%synergy
Shore Up
8.3%inclusion1 decks12 decks
7%synergy
Steady Progress
8.3%inclusion1 decks12 decks
8%synergy
Deflecting Palm
8.3%inclusion1 decks12 decks
3%synergy
Snapback
8.3%inclusion1 decks12 decks
8%synergy
Crimson Wisps
8.3%inclusion1 decks12 decks
7%synergy
Pyroblast
8.3%inclusion1 decks12 decks
6%synergy
Sorceries
Gamble
42%inclusion5 decks12 decks
35%synergy
World at War
25%inclusion3 decks12 decks
23%synergy
Full Throttle
25%inclusion3 decks12 decks
22%synergy
Rite of Flame
25%inclusion3 decks12 decks
22%synergy
Blasphemous Act
25%inclusion3 decks12 decks
2%synergy
Idyllic Tutor
17%inclusion2 decks12 decks
13%synergy
Fabricate
17%inclusion2 decks12 decks
9%synergy
Wheel of Fortune
17%inclusion2 decks12 decks
13%synergy
Tezzeret's Gambit
17%inclusion2 decks12 decks
8%synergy
Waves of Aggression
8.3%inclusion1 decks12 decks
7%synergy
Sevinne's Reclamation
8.3%inclusion1 decks12 decks
-1%synergy
Gitaxian Probe
8.3%inclusion1 decks12 decks
1%synergy
Crackle with Power
8.3%inclusion1 decks12 decks
6%synergy
Seize the Day
8.3%inclusion1 decks12 decks
6%synergy
Stolen Identity
8.3%inclusion1 decks12 decks
8%synergy
Contentious Plan
8.3%inclusion1 decks12 decks
6%synergy
Vandalblast
8.3%inclusion1 decks12 decks
-1%synergy
Twinflame
8.3%inclusion1 decks12 decks
7%synergy
Hidden Strings
8.3%inclusion1 decks12 decks
8%synergy
Irenicus's Vile Duplication
8.3%inclusion1 decks12 decks
6%synergy
Temporal Manipulation
8.3%inclusion1 decks12 decks
7%synergy
Steelshaper's Gift
8.3%inclusion1 decks12 decks
4%synergy
Relentless Assault
8.3%inclusion1 decks12 decks
6%synergy
Transmute Artifact
8.3%inclusion1 decks12 decks
7%synergy
Overpowering Attack
8.3%inclusion1 decks12 decks
7%synergy
Utility Artifacts
Lightning Greaves
50%inclusion6 decks12 decks
25%synergy
Swiftfoot Boots
42%inclusion5 decks12 decks
18%synergy
Sword of Truth and Justice
33%inclusion4 decks12 decks
31%synergy
Maskwood Nexus
33%inclusion4 decks12 decks
33%synergy
Helm of the Host
25%inclusion3 decks12 decks
20%synergy
Herald's Horn
25%inclusion3 decks12 decks
19%synergy
Isochron Scepter
25%inclusion3 decks12 decks
22%synergy
Grinding Station
17%inclusion2 decks12 decks
16%synergy
Phyrexian Altar
17%inclusion2 decks12 decks
16%synergy
Thousand-Year Elixir
17%inclusion2 decks12 decks
16%synergy
Sword of Feast and Famine
17%inclusion2 decks12 decks
12%synergy
Shadowspear
17%inclusion2 decks12 decks
13%synergy
Urza's Incubator
17%inclusion2 decks12 decks
15%synergy
Voltaic Key
8.3%inclusion1 decks12 decks
7%synergy
Lithoform Engine
8.3%inclusion1 decks12 decks
7%synergy
Sensei's Divining Top
8.3%inclusion1 decks12 decks
2%synergy
The Ozolith
8.3%inclusion1 decks12 decks
6%synergy
Manifold Key
8.3%inclusion1 decks12 decks
6%synergy
Mithril Coat
8.3%inclusion1 decks12 decks
2%synergy
Leyline Axe
8.3%inclusion1 decks12 decks
5%synergy
Forsaken Monument
8.3%inclusion1 decks12 decks
8%synergy
Ashnod's Altar
8.3%inclusion1 decks12 decks
7%synergy
Blade of Selves
8.3%inclusion1 decks12 decks
8%synergy
Magewright's Stone
8.3%inclusion1 decks12 decks
8%synergy
Ichormoon Gauntlet
8.3%inclusion1 decks12 decks
5%synergy
Rings of Brighthearth
8.3%inclusion1 decks12 decks
7%synergy
Agatha's Soul Cauldron
8.3%inclusion1 decks12 decks
8%synergy
Brotherhood Regalia
8.3%inclusion1 decks12 decks
5%synergy
Buster Sword
8.3%inclusion1 decks12 decks
5%synergy
Dolmen Gate
8.3%inclusion1 decks12 decks
7%synergy
Enchantments
Teferi's Ageless Insight
42%inclusion5 decks12 decks
37%synergy
Underworld Breach
42%inclusion5 decks12 decks
36%synergy
Curiosity
33%inclusion4 decks12 decks
29%synergy
Inexorable Tide
33%inclusion4 decks12 decks
29%synergy
Windcrag Siege
33%inclusion4 decks12 decks
28%synergy
Land Tax
25%inclusion3 decks12 decks
21%synergy
Kindred Discovery
17%inclusion2 decks12 decks
12%synergy
War of the Last Alliance
17%inclusion2 decks12 decks
16%synergy
Ophidian Eye
17%inclusion2 decks12 decks
16%synergy
Pyrohemia
17%inclusion2 decks12 decks
15%synergy
Breath of Fury
17%inclusion2 decks12 decks
16%synergy
Flowering of the White Tree
8.3%inclusion1 decks12 decks
5%synergy
All Will Be One
8.3%inclusion1 decks12 decks
4%synergy
Authority of the Consuls
8.3%inclusion1 decks12 decks
7%synergy
Alchemist's Talent
8.3%inclusion1 decks12 decks
8%synergy
Mind Over Matter
8.3%inclusion1 decks12 decks
8%synergy
Rising of the Day
8.3%inclusion1 decks12 decks
4%synergy
Fervor
8.3%inclusion1 decks12 decks
8%synergy
Warleader's Call
8.3%inclusion1 decks12 decks
1%synergy
Stasis
8.3%inclusion1 decks12 decks
8%synergy
Cathars' Crusade
8.3%inclusion1 decks12 decks
5%synergy
Sulfuric Vortex
8.3%inclusion1 decks12 decks
8%synergy
Frostcliff Siege
8.3%inclusion1 decks12 decks
-3%synergy
Propaganda
8.3%inclusion1 decks12 decks
-3%synergy
Trouble in Pairs
8.3%inclusion1 decks12 decks
5%synergy
Fated Firepower
8.3%inclusion1 decks12 decks
8%synergy
Impostor Syndrome
8.3%inclusion1 decks12 decks
6%synergy
Impact Tremors
8.3%inclusion1 decks12 decks
-4%synergy
Leyline of Anticipation
8.3%inclusion1 decks12 decks
6%synergy
Proft's Eidetic Memory
8.3%inclusion1 decks12 decks
7%synergy
Leyline of Transformation
8.3%inclusion1 decks12 decks
8%synergy
Battles
Invasion of Kaldheim
8.3%inclusion1 decks12 decks
8%synergy
Invasion of Theros
8.3%inclusion1 decks12 decks
8%synergy
Planeswalkers
Chandra, Torch of Defiance
8.3%inclusion1 decks12 decks
4%synergy
Teferi, Temporal Pilgrim
8.3%inclusion1 decks12 decks
6%synergy
Teferi, Hero of Dominaria
8.3%inclusion1 decks12 decks
6%synergy
Tezzeret, Cruel Captain
8.3%inclusion1 decks12 decks
2%synergy
Utility Lands
Reliquary Tower
58%inclusion7 decks12 decks
24%synergy
Otawara, Soaring City
58%inclusion7 decks12 decks
45%synergy
Mistrise Village
42%inclusion5 decks12 decks
34%synergy
Arena of Glory
33%inclusion4 decks12 decks
30%synergy
Rogue's Passage
33%inclusion4 decks12 decks
13%synergy
Tyrite Sanctum
25%inclusion3 decks12 decks
24%synergy
Eiganjo, Seat of the Empire
25%inclusion3 decks12 decks
20%synergy
Karn's Bastion
25%inclusion3 decks12 decks
13%synergy
Hall of the Bandit Lord
17%inclusion2 decks12 decks
16%synergy
Ancient Den
8.3%inclusion1 decks12 decks
-3%synergy
Mystic Sanctuary
8.3%inclusion1 decks12 decks
2%synergy
Hall of Heliod's Generosity
8.3%inclusion1 decks12 decks
5%synergy
Seat of the Synod
8.3%inclusion1 decks12 decks
-3%synergy
Great Hall of the Citadel
8.3%inclusion1 decks12 decks
7%synergy
City of Traitors
8.3%inclusion1 decks12 decks
7%synergy
Great Furnace
8.3%inclusion1 decks12 decks
-3%synergy
Three Tree City
8.3%inclusion1 decks12 decks
5%synergy
Mana Artifacts
Arcane Signet
100%inclusion12 decks12 decks
11%synergy
Sol Ring
100%inclusion12 decks12 decks
10%synergy
Mox Amber
83%inclusion10 decks12 decks
79%synergy
Mox Opal
83%inclusion10 decks12 decks
78%synergy
Lotus Petal
67%inclusion8 decks12 decks
60%synergy
Mana Vault
58%inclusion7 decks12 decks
53%synergy
Fellwar Stone
58%inclusion7 decks12 decks
26%synergy
Talisman of Progress
50%inclusion6 decks12 decks
4%synergy
Talisman of Creativity
50%inclusion6 decks12 decks
6%synergy
Talisman of Conviction
50%inclusion6 decks12 decks
5%synergy
Altar of the Pantheon
33%inclusion4 decks12 decks
33%synergy
Grim Monolith
33%inclusion4 decks12 decks
31%synergy
Thought Vessel
33%inclusion4 decks12 decks
9%synergy
Chromatic Lantern
25%inclusion3 decks12 decks
15%synergy
Basalt Monolith
25%inclusion3 decks12 decks
23%synergy
Lion's Eye Diamond
25%inclusion3 decks12 decks
22%synergy
Commander's Sphere
17%inclusion2 decks12 decks
3%synergy
Decanter of Endless Water
17%inclusion2 decks12 decks
12%synergy
Everflowing Chalice
8.3%inclusion1 decks12 decks
0%synergy
Replicating Ring
8.3%inclusion1 decks12 decks
7%synergy
Relic of Legends
8.3%inclusion1 decks12 decks
5%synergy
Gilded Lotus
8.3%inclusion1 decks12 decks
6%synergy
Thran Dynamo
8.3%inclusion1 decks12 decks
6%synergy
Chromatic Orrery
8.3%inclusion1 decks12 decks
8%synergy
Mox Jasper
8.3%inclusion1 decks12 decks
8%synergy
Lands
Tundra
100%inclusion12 decks12 decks
89%synergy
Steam Vents
100%inclusion12 decks12 decks
60%synergy
Volcanic Island
100%inclusion12 decks12 decks
89%synergy
Sacred Foundry
92%inclusion11 decks12 decks
52%synergy
Plateau
92%inclusion11 decks12 decks
80%synergy
Scalding Tarn
92%inclusion11 decks12 decks
64%synergy
Arid Mesa
92%inclusion11 decks12 decks
64%synergy
Hallowed Fountain
92%inclusion11 decks12 decks
51%synergy
Flooded Strand
92%inclusion11 decks12 decks
62%synergy
Command Tower
83%inclusion10 decks12 decks
-9%synergy
Raugrin Triome
75%inclusion9 decks12 decks
38%synergy
Spectator Seating
67%inclusion8 decks12 decks
36%synergy
Mana Confluence
67%inclusion8 decks12 decks
59%synergy
Training Center
67%inclusion8 decks12 decks
35%synergy
Cavern of Souls
67%inclusion8 decks12 decks
63%synergy
Sea of Clouds
58%inclusion7 decks12 decks
27%synergy
Gemstone Caverns
58%inclusion7 decks12 decks
54%synergy
Misty Rainforest
50%inclusion6 decks12 decks
43%synergy
Exotic Orchard
50%inclusion6 decks12 decks
-11%synergy
Wooded Foothills
50%inclusion6 decks12 decks
44%synergy
Marsh Flats
50%inclusion6 decks12 decks
44%synergy
Mountain
50%inclusion6 decks12 decks
-44%synergy
Island
50%inclusion6 decks12 decks
-46%synergy
Plains
42%inclusion5 decks12 decks
-53%synergy
Sink into Stupor
42%inclusion5 decks12 decks
32%synergy
City of Brass
42%inclusion5 decks12 decks
33%synergy
Bloodstained Mire
42%inclusion5 decks12 decks
35%synergy
Windswept Heath
33%inclusion4 decks12 decks
27%synergy
Plaza of Heroes
33%inclusion4 decks12 decks
31%synergy
Polluted Delta
33%inclusion4 decks12 decks
26%synergy
Shivan Reef
25%inclusion3 decks12 decks
-15%synergy
Riverpyre Verge
25%inclusion3 decks12 decks
17%synergy
Battlefield Forge
25%inclusion3 decks12 decks
-16%synergy
Thundering Falls
25%inclusion3 decks12 decks
16%synergy
Sunbillow Verge
25%inclusion3 decks12 decks
17%synergy
Adarkar Wastes
25%inclusion3 decks12 decks
-9%synergy
Stormcarved Coast
17%inclusion2 decks12 decks
-6%synergy
Sundown Pass
17%inclusion2 decks12 decks
-3%synergy
Tarnished Citadel
17%inclusion2 decks12 decks
16%synergy
Elegant Parlor
17%inclusion2 decks12 decks
9%synergy
Legion Leadership
17%inclusion2 decks12 decks
10%synergy
Path of Ancestry
17%inclusion2 decks12 decks
-11%synergy
Mystic Monastery
17%inclusion2 decks12 decks
-42%synergy
Deserted Beach
17%inclusion2 decks12 decks
-6%synergy
Floodfarm Verge
17%inclusion2 decks12 decks
7%synergy
Fiery Islet
8.3%inclusion1 decks12 decks
2%synergy
Prismatic Vista
8.3%inclusion1 decks12 decks
5%synergy
Gemstone Mine
8.3%inclusion1 decks12 decks
8%synergy
Inspiring Vantage
8.3%inclusion1 decks12 decks
5%synergy
Spire of Industry
8.3%inclusion1 decks12 decks
-4%synergy