Silas Renn, Seeker Adept // Toggo, Goblin Weaponsmith (Commander) - Artifacts

Silas Renn, Seeker Adept // Toggo, Goblin Weaponsmith
Rank #2,261
89decks
Background image for The Top 10 cEDH Decks of 2025
DougY
Dec 19, 2025
The Top 10 cEDH Decks of 2025
As 2025 ends, let's take a look at the more competitive sector of Commander, and see which are the top 10 performing decks of cEDH this year.
Deck Filters
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Seat of the Synod
85%inclusion76 decks89 decks
80%synergy
Great Furnace
84%inclusion75 decks89 decks
79%synergy
Vault of Whispers
82%inclusion73 decks89 decks
77%synergy
Emry, Lurker of the Loch
74%inclusion66 decks89 decks
70%synergy
Darksteel Citadel
63%inclusion56 decks89 decks
61%synergy
Thought Monitor
61%inclusion54 decks89 decks
58%synergy
Sai, Master Thopterist
58%inclusion52 decks89 decks
57%synergy
Enthusiastic Mechanaut
56%inclusion50 decks89 decks
52%synergy
Reckless Fireweaver
52%inclusion46 decks89 decks
50%synergy
Etherium Sculptor
53%inclusion47 decks89 decks
49%synergy
Top Cards
Baleful Strix
55%inclusion49 decks89 decks
45%synergy
Solemn Simulacrum
53%inclusion47 decks89 decks
40%synergy
Wayfarer's Bauble
52%inclusion46 decks89 decks
39%synergy
Goblin Engineer
47%inclusion42 decks89 decks
45%synergy
Cranial Plating
47%inclusion42 decks89 decks
46%synergy
Tezzeret, Master of the Bridge
47%inclusion42 decks89 decks
45%synergy
Jhoira, Weatherlight Captain
46%inclusion41 decks89 decks
42%synergy
Shimmer Dragon
46%inclusion41 decks89 decks
46%synergy
Cryogen Relic
45%inclusion9 decks20 decks
44%synergy
Goblin Welder
45%inclusion40 decks89 decks
43%synergy
Game Changers
Cyclonic Rift
22%inclusion20 decks89 decks
0%synergy
Bolas's Citadel
20%inclusion18 decks89 decks
15%synergy
The One Ring
17%inclusion15 decks89 decks
3%synergy
Fierce Guardianship
17%inclusion15 decks89 decks
-3%synergy
Demonic Tutor
12%inclusion11 decks89 decks
-9%synergy
Rhystic Study
11%inclusion10 decks89 decks
-13%synergy
Vampiric Tutor
9.0%inclusion8 decks89 decks
-7%synergy
Mana Vault
7.9%inclusion7 decks89 decks
-1%synergy
Ancient Tomb
6.7%inclusion6 decks89 decks
-6%synergy
Jeska's Will
5.6%inclusion5 decks89 decks
-11%synergy
Creatures
Kappa Cannoneer
44%inclusion39 decks89 decks
43%synergy
Marionette Master
43%inclusion38 decks89 decks
41%synergy
Scrap Trawler
40%inclusion36 decks89 decks
38%synergy
Foundry Inspector
40%inclusion36 decks89 decks
36%synergy
Urza, Lord High Artificer
40%inclusion36 decks89 decks
39%synergy
Imskir Iron-Eater
39%inclusion28 decks72 decks
38%synergy
Phyrexian Metamorph
34%inclusion30 decks89 decks
28%synergy
Cyberdrive Awakener
33%inclusion29 decks89 decks
30%synergy
Brudiclad, Telchor Engineer
31%inclusion28 decks89 decks
28%synergy
Myr Retriever
31%inclusion28 decks89 decks
30%synergy
Mirkwood Bats
29%inclusion26 decks89 decks
26%synergy
Marionette Apprentice
29%inclusion21 decks72 decks
27%synergy
Forensic Gadgeteer
28%inclusion25 decks89 decks
27%synergy
Master Transmuter
27%inclusion24 decks89 decks
25%synergy
Slobad, Goblin Tinkerer
26%inclusion23 decks89 decks
25%synergy
Burnished Hart
26%inclusion23 decks89 decks
23%synergy
Ingenious Artillerist
25%inclusion22 decks89 decks
24%synergy
Walking Atlas
25%inclusion22 decks89 decks
24%synergy
Golbez, Crystal Collector
23%inclusion5 decks22 decks
19%synergy
Stridehangar Automaton
22%inclusion6 decks27 decks
22%synergy
Noxious Gearhulk
21%inclusion19 decks89 decks
18%synergy
Wurmcoil Engine
20%inclusion18 decks89 decks
19%synergy
Padeem, Consul of Innovation
19%inclusion17 decks89 decks
15%synergy
Whirler Rogue
18%inclusion16 decks89 decks
18%synergy
Jhoira's Familiar
18%inclusion16 decks89 decks
17%synergy
Loyal Apprentice
17%inclusion15 decks89 decks
15%synergy
Imotekh the Stormlord
17%inclusion15 decks89 decks
17%synergy
Kuldotha Forgemaster
17%inclusion15 decks89 decks
16%synergy
Crime Novelist
16%inclusion14 decks89 decks
15%synergy
The Reality Chip
16%inclusion14 decks89 decks
15%synergy
Umbral Collar Zealot
15%inclusion3 decks20 decks
14%synergy
Dauntless Scrapbot
15%inclusion3 decks20 decks
14%synergy
Pinnacle Emissary
15%inclusion3 decks20 decks
13%synergy
Mayhem Devil
15%inclusion13 decks89 decks
12%synergy
Farid, Enterprising Salvager
15%inclusion13 decks89 decks
14%synergy
Ashnod the Uncaring
15%inclusion13 decks89 decks
14%synergy
Trinket Mage
15%inclusion13 decks89 decks
13%synergy
Myr Battlesphere
13%inclusion12 decks89 decks
11%synergy
Disciple of the Vault
13%inclusion12 decks89 decks
13%synergy
Scaretiller
13%inclusion12 decks89 decks
13%synergy
Zell Dincht
13%inclusion3 decks23 decks
13%synergy
Junk Diver
12%inclusion11 decks89 decks
12%synergy
Gleaming Geardrake
12%inclusion11 decks89 decks
12%synergy
Metalwork Colossus
11%inclusion10 decks89 decks
9%synergy
Meteor Golem
11%inclusion10 decks89 decks
11%synergy
Braids, Arisen Nightmare
11%inclusion10 decks89 decks
7%synergy
Blightsteel Colossus
11%inclusion10 decks89 decks
11%synergy
Shao Jun
11%inclusion7 decks66 decks
10%synergy
Hellkite Tyrant
10%inclusion9 decks89 decks
9%synergy
Dalakos, Crafter of Wonders
10%inclusion9 decks89 decks
9%synergy
Instants
Chaos Warp
45%inclusion40 decks89 decks
8%synergy
Deadly Dispute
40%inclusion36 decks89 decks
33%synergy
Counterspell
34%inclusion30 decks89 decks
-10%synergy
Whir of Invention
25%inclusion22 decks89 decks
24%synergy
Negate
24%inclusion21 decks89 decks
1%synergy
An Offer You Can't Refuse
21%inclusion19 decks89 decks
-7%synergy
Fanatical Offering
18%inclusion16 decks89 decks
18%synergy
Thirst for Knowledge
18%inclusion16 decks89 decks
16%synergy
Arcane Denial
18%inclusion16 decks89 decks
-11%synergy
Mana Drain
13%inclusion12 decks89 decks
-2%synergy
Swan Song
13%inclusion12 decks89 decks
-5%synergy
Deadly Rollick
12%inclusion11 decks89 decks
-4%synergy
Terminate
12%inclusion11 decks89 decks
-14%synergy
Rakdos Charm
11%inclusion10 decks89 decks
-4%synergy
Reality Shift
11%inclusion10 decks89 decks
6%synergy
Spell Swindle
11%inclusion10 decks89 decks
9%synergy
Big Score
10%inclusion9 decks89 decks
0%synergy
Divert Disaster
10%inclusion2 decks20 decks
9%synergy
Scour for Scrap
10%inclusion2 decks20 decks
9%synergy
Resculpt
9.0%inclusion8 decks89 decks
7%synergy
Bedevil
9.0%inclusion8 decks89 decks
-8%synergy
Masterful Replication
9.0%inclusion8 decks89 decks
9%synergy
Abrade
9.0%inclusion8 decks89 decks
0%synergy
Desynchronization
9.0%inclusion6 decks67 decks
6%synergy
Sink into Stupor
8.3%inclusion6 decks72 decks
-1%synergy
Fact or Fiction
7.9%inclusion7 decks89 decks
0%synergy
Demand Answers
7.9%inclusion7 decks89 decks
4%synergy
Deflecting Swat
6.7%inclusion6 decks89 decks
-11%synergy
Valakut Awakening
6.7%inclusion6 decks89 decks
3%synergy
Untimely Malfunction
5.9%inclusion3 decks51 decks
0%synergy
Urza's Command
5.6%inclusion5 decks89 decks
6%synergy
Prismari Command
5.6%inclusion5 decks89 decks
0%synergy
Disruption Protocol
5.6%inclusion5 decks89 decks
5%synergy
Stoic Rebuttal
5.6%inclusion5 decks89 decks
5%synergy
Consult the Star Charts
5.0%inclusion1 decks20 decks
4%synergy
Sorceries
Blasphemous Act
44%inclusion39 decks89 decks
-2%synergy
Thoughtcast
33%inclusion29 decks89 decks
30%synergy
Fabricate
28%inclusion25 decks89 decks
25%synergy
Terisiare's Devastation
24%inclusion21 decks89 decks
22%synergy
Rise and Shine
24%inclusion21 decks89 decks
23%synergy
Vandalblast
19%inclusion17 decks89 decks
2%synergy
Feed the Swarm
18%inclusion16 decks89 decks
-12%synergy
Trash for Treasure
18%inclusion16 decks89 decks
17%synergy
Monumental Corruption
13%inclusion12 decks89 decks
13%synergy
Toxic Deluge
12%inclusion11 decks89 decks
-8%synergy
Faithless Looting
12%inclusion11 decks89 decks
-7%synergy
Reshape
10%inclusion9 decks89 decks
10%synergy
Reckless Handling
9.0%inclusion8 decks89 decks
8%synergy
Scrap Mastery
7.9%inclusion7 decks89 decks
7%synergy
Universal Surveillance
7.9%inclusion7 decks89 decks
8%synergy
Haunt the Network
7.4%inclusion2 decks27 decks
7%synergy
Chain Reaction
6.7%inclusion6 decks89 decks
4%synergy
Saheeli's Directive
6.7%inclusion6 decks89 decks
7%synergy
Reverse Engineer
6.7%inclusion6 decks89 decks
7%synergy
Blood Money
5.6%inclusion5 decks89 decks
1%synergy
Utility Artifacts
Ichor Wellspring
43%inclusion38 decks89 decks
40%synergy
Idol of Oblivion
31%inclusion28 decks89 decks
29%synergy
Krark-Clan Ironworks
30%inclusion27 decks89 decks
30%synergy
Trading Post
29%inclusion26 decks89 decks
28%synergy
Worldwalker Helm
29%inclusion22 decks77 decks
28%synergy
Inspiring Statuary
28%inclusion25 decks89 decks
27%synergy
Cranial Ram
28%inclusion20 decks72 decks
27%synergy
Time Sieve
27%inclusion24 decks89 decks
25%synergy
Aether Spellbomb
26%inclusion23 decks89 decks
25%synergy
Nihil Spellbomb
25%inclusion22 decks89 decks
23%synergy
Oni-Cult Anvil
25%inclusion22 decks89 decks
23%synergy
Unwinding Clock
22%inclusion20 decks89 decks
21%synergy
Repurposing Bay
21%inclusion6 decks28 decks
20%synergy
Executioner's Capsule
21%inclusion19 decks89 decks
20%synergy
Mishra's Bauble
20%inclusion18 decks89 decks
19%synergy
Sculpting Steel
20%inclusion18 decks89 decks
19%synergy
Lightning Greaves
19%inclusion17 decks89 decks
-11%synergy
Demonic Junker
19%inclusion5 decks27 decks
16%synergy
Crucible of Worlds
18%inclusion16 decks89 decks
17%synergy
Mystic Forge
18%inclusion16 decks89 decks
16%synergy
Spine of Ish Sah
18%inclusion16 decks89 decks
16%synergy
Clock of Omens
18%inclusion16 decks89 decks
18%synergy
Nettlecyst
17%inclusion15 decks89 decks
16%synergy
Sword of the Animist
17%inclusion15 decks89 decks
15%synergy
Soul-Guide Lantern
16%inclusion14 decks89 decks
15%synergy
Expedition Map
16%inclusion14 decks89 decks
14%synergy
Swiftfoot Boots
16%inclusion14 decks89 decks
-10%synergy
Dowsing Device
15%inclusion13 decks89 decks
14%synergy
Tarrian's Journal
15%inclusion13 decks89 decks
14%synergy
Pyrite Spellbomb
13%inclusion12 decks89 decks
13%synergy
Mycosynth Wellspring
13%inclusion12 decks89 decks
12%synergy
Simulacrum Synthesizer
13%inclusion10 decks76 decks
11%synergy
Sensei's Divining Top
12%inclusion11 decks89 decks
9%synergy
Portal to Phyrexia
12%inclusion11 decks89 decks
10%synergy
Salvaging Station
12%inclusion11 decks89 decks
12%synergy
Nevinyrral's Disk
11%inclusion10 decks89 decks
10%synergy
Thieves' Tools
11%inclusion10 decks89 decks
11%synergy
Mephitic Draught
10%inclusion9 decks89 decks
10%synergy
Urza's Bauble
10%inclusion9 decks89 decks
10%synergy
Encroaching Mycosynth
10%inclusion9 decks89 decks
10%synergy
Dubious Delicacy
10%inclusion2 decks20 decks
10%synergy
The Regalia
9.1%inclusion2 decks22 decks
7%synergy
Esoteric Duplicator
9.1%inclusion7 decks77 decks
8%synergy
Navigation Orb
9.0%inclusion8 decks89 decks
9%synergy
The Everflowing Well
9.0%inclusion8 decks89 decks
8%synergy
Manifold Key
9.0%inclusion8 decks89 decks
8%synergy
Dragonspark Reactor
9.0%inclusion8 decks89 decks
9%synergy
Brass's Tunnel-Grinder
9.0%inclusion8 decks89 decks
7%synergy
Lithoform Engine
7.9%inclusion7 decks89 decks
5%synergy
Grinding Station
7.9%inclusion7 decks89 decks
6%synergy
Enchantments
Storm the Vault
39%inclusion35 decks89 decks
37%synergy
Ghirapur Aether Grid
31%inclusion28 decks89 decks
31%synergy
Weapons Manufacturing
30%inclusion6 decks20 decks
29%synergy
Thopter Spy Network
29%inclusion26 decks89 decks
25%synergy
Mirrodin Besieged
24%inclusion21 decks89 decks
23%synergy
Mechanized Production
18%inclusion16 decks89 decks
13%synergy
Moonlit Meditation
15%inclusion3 decks20 decks
14%synergy
Agent of the Iron Throne
15%inclusion13 decks89 decks
14%synergy
Street Urchin
12%inclusion11 decks89 decks
12%synergy
Retreat to Coralhelm
9.0%inclusion8 decks89 decks
9%synergy
Phyrexian Scriptures
9.0%inclusion8 decks89 decks
8%synergy
Efficient Construction
9.0%inclusion8 decks89 decks
9%synergy
Valakut Exploration
7.9%inclusion7 decks89 decks
8%synergy
The Brothers' War
6.7%inclusion6 decks89 decks
7%synergy
Mystic Remora
6.7%inclusion6 decks89 decks
-9%synergy
Revel in Riches
6.7%inclusion6 decks89 decks
3%synergy
Curse of Opulence
5.6%inclusion5 decks89 decks
2%synergy
Retreat to Hagra
5.6%inclusion5 decks89 decks
6%synergy
Scavenger's Talent
5.2%inclusion3 decks58 decks
5%synergy
Planeswalkers
Daretti, Scrap Savant
33%inclusion29 decks89 decks
31%synergy
Saheeli, Sublime Artificer
18%inclusion16 decks89 decks
17%synergy
Tezzeret, Betrayer of Flesh
16%inclusion14 decks89 decks
15%synergy
Daretti, Ingenious Iconoclast
15%inclusion13 decks89 decks
14%synergy
Tezzeret the Seeker
13%inclusion12 decks89 decks
13%synergy
Saheeli, the Gifted
12%inclusion11 decks89 decks
12%synergy
Karn, Scion of Urza
11%inclusion10 decks89 decks
11%synergy
Chandra, Spark Hunter
11%inclusion3 decks28 decks
10%synergy
Tezzeret, Cruel Captain
9.1%inclusion2 decks22 decks
8%synergy
Tezzeret, Artifice Master
9.0%inclusion8 decks89 decks
9%synergy
Saheeli, Filigree Master
6.7%inclusion6 decks89 decks
6%synergy
Tezzeret, Agent of Bolas
6.7%inclusion6 decks89 decks
6%synergy
Utility Lands
Buried Ruin
44%inclusion39 decks89 decks
40%synergy
Inventors' Fair
36%inclusion32 decks89 decks
33%synergy
Archway of Innovation
36%inclusion25 decks70 decks
33%synergy
Treasure Vault
31%inclusion28 decks89 decks
30%synergy
Urza's Saga
28%inclusion25 decks89 decks
23%synergy
Academy Ruins
25%inclusion22 decks89 decks
21%synergy
Bojuka Bog
22%inclusion20 decks89 decks
-2%synergy
Reliquary Tower
16%inclusion14 decks89 decks
-20%synergy
Uthros, Titanic Godcore
15%inclusion3 decks20 decks
13%synergy
Fomori Vault
12%inclusion9 decks76 decks
11%synergy
Otawara, Soaring City
10%inclusion9 decks89 decks
-6%synergy
Takenuma, Abandoned Mire
9.0%inclusion8 decks89 decks
4%synergy
Access Tunnel
9.0%inclusion8 decks89 decks
7%synergy
Ghost Town
7.9%inclusion7 decks89 decks
8%synergy
Urza's Tower
7.9%inclusion7 decks89 decks
8%synergy
Urza's Mine
7.9%inclusion7 decks89 decks
8%synergy
Urza's Power Plant
7.9%inclusion7 decks89 decks
8%synergy
Temple of the False God
6.7%inclusion6 decks89 decks
-2%synergy
Urborg, Tomb of Yawgmoth
6.7%inclusion6 decks89 decks
-7%synergy
Rogue's Passage
6.7%inclusion6 decks89 decks
-16%synergy
Ghost Quarter
5.6%inclusion5 decks89 decks
5%synergy
Secluded Starforge
5.0%inclusion1 decks20 decks
5%synergy
Mana Artifacts
Sol Ring
83%inclusion74 decks89 decks
-7%synergy
Arcane Signet
80%inclusion71 decks89 decks
-8%synergy
Dimir Signet
42%inclusion37 decks89 decks
4%synergy
Izzet Signet
40%inclusion36 decks89 decks
6%synergy
Talisman of Creativity
38%inclusion34 decks89 decks
-6%synergy
Rakdos Signet
35%inclusion31 decks89 decks
0%synergy
Talisman of Dominance
35%inclusion31 decks89 decks
-14%synergy
Mind Stone
33%inclusion29 decks89 decks
19%synergy
Fellwar Stone
30%inclusion27 decks89 decks
-5%synergy
Talisman of Indulgence
28%inclusion25 decks89 decks
-14%synergy
Liquimetal Torque
27%inclusion24 decks89 decks
25%synergy
Lotus Petal
15%inclusion13 decks89 decks
5%synergy
Commander's Sphere
13%inclusion12 decks89 decks
-8%synergy
Cursed Mirror
13%inclusion12 decks89 decks
8%synergy
Crystal Skull, Isu Spyglass
10%inclusion7 decks67 decks
9%synergy
Blinkmoth Urn
10%inclusion9 decks89 decks
10%synergy
Thran Dynamo
10%inclusion9 decks89 decks
5%synergy
Machine God's Effigy
9.0%inclusion8 decks89 decks
7%synergy
Basalt Monolith
9.0%inclusion8 decks89 decks
7%synergy
Chromatic Star
7.9%inclusion7 decks89 decks
7%synergy
Mox Opal
7.9%inclusion7 decks89 decks
0%synergy
Mox Amber
6.7%inclusion6 decks89 decks
1%synergy
Hedron Archive
6.7%inclusion6 decks89 decks
5%synergy
Thought Vessel
6.7%inclusion6 decks89 decks
-15%synergy
Midnight Clock
5.6%inclusion5 decks89 decks
2%synergy
Everflowing Chalice
5.6%inclusion5 decks89 decks
3%synergy
Moonsnare Prototype
5.6%inclusion5 decks89 decks
5%synergy
Coveted Jewel
5.6%inclusion5 decks89 decks
5%synergy
Relic of Sauron
5.6%inclusion5 decks89 decks
-14%synergy
All-Fates Scroll
5.0%inclusion1 decks20 decks
5%synergy
The Soul Stone
5.0%inclusion1 decks20 decks
1%synergy
Lands
Island
98%inclusion87 decks89 decks
5%synergy
Swamp
97%inclusion86 decks89 decks
4%synergy
Mountain
96%inclusion85 decks89 decks
4%synergy
Command Tower
92%inclusion82 decks89 decks
0%synergy
Silverbluff Bridge
74%inclusion66 decks89 decks
70%synergy
Mistvault Bridge
73%inclusion65 decks89 decks
69%synergy
Drossforge Bridge
71%inclusion63 decks89 decks
67%synergy
Watery Grave
48%inclusion43 decks89 decks
2%synergy
Blood Crypt
46%inclusion41 decks89 decks
2%synergy
Steam Vents
44%inclusion39 decks89 decks
0%synergy
Scalding Tarn
42%inclusion37 decks89 decks
10%synergy
Xander's Lounge
40%inclusion36 decks89 decks
0%synergy
Seething Landscape
40%inclusion29 decks72 decks
23%synergy
Bloodstained Mire
39%inclusion35 decks89 decks
5%synergy
Spire of Industry
39%inclusion35 decks89 decks
35%synergy
Polluted Delta
37%inclusion33 decks89 decks
3%synergy
Exotic Orchard
36%inclusion32 decks89 decks
-21%synergy
Crumbling Necropolis
35%inclusion31 decks89 decks
-20%synergy
Evolving Wilds
35%inclusion31 decks89 decks
10%synergy
Terramorphic Expanse
34%inclusion30 decks89 decks
13%synergy
Izzet Boilerworks
31%inclusion28 decks89 decks
19%synergy
Fabled Passage
31%inclusion28 decks89 decks
24%synergy
Dimir Aqueduct
30%inclusion27 decks89 decks
18%synergy
Maestros Theater
27%inclusion24 decks89 decks
17%synergy
Shivan Reef
25%inclusion22 decks89 decks
-4%synergy
Myriad Landscape
25%inclusion22 decks89 decks
14%synergy
Rakdos Carnarium
22%inclusion20 decks89 decks
11%synergy
Luxury Suite
21%inclusion19 decks89 decks
-11%synergy
Sulfur Falls
20%inclusion18 decks89 decks
-26%synergy
Smoldering Marsh
19%inclusion17 decks89 decks
-19%synergy
Sunken Hollow
19%inclusion17 decks89 decks
-21%synergy
Training Center
17%inclusion15 decks89 decks
-16%synergy
Morphic Pool
17%inclusion15 decks89 decks
-16%synergy
Path of Ancestry
16%inclusion14 decks89 decks
-16%synergy
Power Depot
15%inclusion13 decks89 decks
14%synergy
Marsh Flats
13%inclusion12 decks89 decks
3%synergy
Prismatic Vista
13%inclusion12 decks89 decks
10%synergy
Underground River
13%inclusion12 decks89 decks
-14%synergy
Sulfurous Springs
12%inclusion11 decks89 decks
-14%synergy
Shadowblood Ridge
11%inclusion10 decks89 decks
1%synergy
Darkwater Catacombs
11%inclusion10 decks89 decks
-1%synergy
Dragonskull Summit
11%inclusion10 decks89 decks
-33%synergy
Grixis Panorama
11%inclusion10 decks89 decks
8%synergy
Scene of the Crime
10%inclusion9 decks89 decks
10%synergy
Arid Mesa
10%inclusion9 decks89 decks
1%synergy
Escape Tunnel
10%inclusion9 decks89 decks
9%synergy
Drowned Catacomb
10%inclusion9 decks89 decks
-32%synergy
Command Bridge
10%inclusion2 decks20 decks
9%synergy
The Mycosynth Gardens
9.0%inclusion8 decks89 decks
8%synergy
Misty Rainforest
9.0%inclusion8 decks89 decks
-1%synergy