Barnabas Tharmr // Vial Smasher the Fierce (Commander) - Burn

Alternate Names:

Barnabas Tharmr // Clive RosfieldBarnabas Tharmr // Clive Rosfield

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
Bender's Waterskin
23%inclusion3 decks13 decks
19%synergy
Foggy Swamp Visions
11%inclusion1 decks9 decks
10%synergy
Fated Firepower
7.7%inclusion1 decks13 decks
3%synergy
Redirect Lightning
7.7%inclusion1 decks13 decks
-1%synergy
Yue, the Moon Spirit
7.1%inclusion1 decks14 decks
7%synergy
High Synergy Cards
Curiosity
69%inclusion20 decks29 decks
65%synergy
Kaervek the Merciless
48%inclusion14 decks29 decks
47%synergy
The Lord of Pain
46%inclusion11 decks24 decks
44%synergy
Guttersnipe
45%inclusion13 decks29 decks
39%synergy
Brainstorm
55%inclusion16 decks29 decks
38%synergy
Bojuka Bog
62%inclusion18 decks29 decks
38%synergy
Tor Wauki the Younger
38%inclusion11 decks29 decks
37%synergy
Lightning Bolt
45%inclusion13 decks29 decks
36%synergy
Blasphemous Act
79%inclusion23 decks29 decks
34%synergy
Wayfarer's Bauble
45%inclusion13 decks29 decks
32%synergy
Top Cards
Chaos Warp
55%inclusion16 decks29 decks
19%synergy
Frantic Search
48%inclusion14 decks29 decks
30%synergy
Vandalblast
45%inclusion13 decks29 decks
28%synergy
Windfall
38%inclusion11 decks29 decks
14%synergy
Dark Ritual
38%inclusion11 decks29 decks
3%synergy
Black Waltz No. 3
37%inclusion7 decks19 decks
31%synergy
Ponder
34%inclusion10 decks29 decks
26%synergy
Fiery Inscription
34%inclusion10 decks29 decks
30%synergy
Kuja, Genome Sorcerer
32%inclusion6 decks19 decks
26%synergy
An Offer You Can't Refuse
31%inclusion9 decks29 decks
3%synergy
Game Changers
Jeska's Will
21%inclusion6 decks29 decks
4%synergy
Fierce Guardianship
21%inclusion6 decks29 decks
1%synergy
Rhystic Study
17%inclusion5 decks29 decks
-7%synergy
Force of Will
14%inclusion4 decks29 decks
3%synergy
Gamble
14%inclusion4 decks29 decks
4%synergy
Mana Vault
10%inclusion3 decks29 decks
1%synergy
Narset, Parter of Veils
10%inclusion3 decks29 decks
7%synergy
Cyclonic Rift
10%inclusion3 decks29 decks
-12%synergy
Mystical Tutor
10%inclusion3 decks29 decks
-3%synergy
Opposition Agent
6.9%inclusion2 decks29 decks
2%synergy
Creatures
Rampaging Ferocidon
31%inclusion9 decks29 decks
31%synergy
Nightscape Familiar
31%inclusion9 decks29 decks
4%synergy
Kederekt Parasite
31%inclusion9 decks29 decks
26%synergy
Zo-Zu the Punisher
28%inclusion8 decks29 decks
27%synergy
Tandem Lookout
28%inclusion8 decks29 decks
27%synergy
Brash Taunter
28%inclusion8 decks29 decks
27%synergy
Shadow of Mortality
28%inclusion8 decks29 decks
27%synergy
Scrawling Crawler
25%inclusion6 decks24 decks
16%synergy
Niv-Mizzet, Visionary
25%inclusion6 decks24 decks
23%synergy
Keranos, God of Storms
24%inclusion7 decks29 decks
24%synergy
Wavebreak Hippocamp
24%inclusion7 decks29 decks
24%synergy
Neheb, the Eternal
24%inclusion7 decks29 decks
23%synergy
Vivi Ornitier
21%inclusion4 decks19 decks
13%synergy
Ingot Chewer
21%inclusion6 decks29 decks
21%synergy
Pink Horror
21%inclusion6 decks29 decks
19%synergy
Obosh, the Preypiercer
21%inclusion6 decks29 decks
20%synergy
Shriekmaw
21%inclusion6 decks29 decks
20%synergy
Burnished Hart
21%inclusion6 decks29 decks
18%synergy
Nekusar, the Mindrazer
21%inclusion6 decks29 decks
19%synergy
Storm-Kiln Artist
21%inclusion6 decks29 decks
11%synergy
Veyran, Voice of Duality
21%inclusion6 decks29 decks
16%synergy
Pinnacle Monk
20%inclusion5 decks25 decks
16%synergy
Judith, Carnage Connoisseur
18%inclusion5 decks28 decks
17%synergy
Syr Konrad, the Grim
17%inclusion5 decks29 decks
14%synergy
Niv-Mizzet, Parun
17%inclusion5 decks29 decks
12%synergy
Goblin Electromancer
17%inclusion5 decks29 decks
9%synergy
Archmage Emeritus
17%inclusion5 decks29 decks
8%synergy
Solphim, Mayhem Dominus
17%inclusion5 decks29 decks
14%synergy
Twilight Prophet
17%inclusion5 decks29 decks
12%synergy
Heartless Hidetsugu
17%inclusion5 decks29 decks
17%synergy
Sygg, River Cutthroat
17%inclusion5 decks29 decks
16%synergy
Kess, Dissident Mage
17%inclusion5 decks29 decks
8%synergy
Archmage of Runes
17%inclusion4 decks24 decks
14%synergy
High Fae Trickster
17%inclusion4 decks24 decks
11%synergy
Twinflame Tyrant
17%inclusion4 decks24 decks
16%synergy
The Emperor of Palamecia
16%inclusion3 decks19 decks
13%synergy
Xantcha, Sleeper Agent
14%inclusion4 decks29 decks
13%synergy
Thryx, the Sudden Storm
14%inclusion4 decks29 decks
14%synergy
Mulldrifter
14%inclusion4 decks29 decks
11%synergy
Faerie Mastermind
14%inclusion4 decks29 decks
7%synergy
Unruly Catapult
14%inclusion4 decks29 decks
14%synergy
Hullbreaker Horror
14%inclusion4 decks29 decks
9%synergy
Florian, Voldaren Scion
14%inclusion4 decks29 decks
13%synergy
Gleeful Arsonist
13%inclusion3 decks24 decks
12%synergy
Kindlespark Duo
13%inclusion3 decks24 decks
12%synergy
Razorkin Needlehead
13%inclusion3 decks24 decks
6%synergy
Hydroelectric Specimen
12%inclusion3 decks25 decks
9%synergy
Nulldrifter
12%inclusion3 decks25 decks
12%synergy
Summon: Primal Odin
11%inclusion2 decks19 decks
10%synergy
Gogo, Master of Mimicry
11%inclusion2 decks19 decks
8%synergy
Instants
Delayed Blast Fireball
31%inclusion9 decks29 decks
29%synergy
Bedevil
31%inclusion9 decks29 decks
14%synergy
Pongify
28%inclusion8 decks29 decks
21%synergy
Kolaghan's Command
28%inclusion8 decks29 decks
26%synergy
Risk Factor
28%inclusion8 decks29 decks
27%synergy
Murderous Cut
28%inclusion8 decks29 decks
27%synergy
Mystic Confluence
28%inclusion8 decks29 decks
25%synergy
Dig Through Time
28%inclusion8 decks29 decks
24%synergy
Swan Song
24%inclusion7 decks29 decks
5%synergy
Blood for the Blood God!
24%inclusion7 decks29 decks
21%synergy
Deflecting Swat
24%inclusion7 decks29 decks
6%synergy
Counterspell
24%inclusion7 decks29 decks
-20%synergy
Curtains' Call
24%inclusion7 decks29 decks
23%synergy
Prismari Command
24%inclusion7 decks29 decks
18%synergy
Invert Polarity
24%inclusion6 decks25 decks
21%synergy
Soul Shatter
21%inclusion6 decks29 decks
18%synergy
Terminate
21%inclusion6 decks29 decks
-5%synergy
Opt
21%inclusion6 decks29 decks
15%synergy
Breath of Malfegor
21%inclusion6 decks29 decks
20%synergy
Unwind
21%inclusion6 decks29 decks
19%synergy
Ionize
17%inclusion5 decks29 decks
17%synergy
Deadly Rollick
17%inclusion5 decks29 decks
1%synergy
Murder
17%inclusion5 decks29 decks
14%synergy
Misdirection
17%inclusion5 decks29 decks
16%synergy
Sink into Stupor
16%inclusion4 decks25 decks
6%synergy
Rapid Hybridization
14%inclusion4 decks29 decks
10%synergy
Negate
14%inclusion4 decks29 decks
-9%synergy
Consider
14%inclusion4 decks29 decks
8%synergy
Rakdos Charm
14%inclusion4 decks29 decks
-1%synergy
Nexus of Fate
14%inclusion4 decks29 decks
13%synergy
Reality Shift
14%inclusion4 decks29 decks
9%synergy
Spell Swindle
14%inclusion4 decks29 decks
12%synergy
Disallow
14%inclusion4 decks29 decks
12%synergy
Force of Negation
14%inclusion4 decks29 decks
6%synergy
Pull from Tomorrow
14%inclusion4 decks29 decks
13%synergy
Withering Torment
13%inclusion3 decks24 decks
0%synergy
Fire Covenant
10%inclusion3 decks29 decks
9%synergy
Electrodominance
10%inclusion3 decks29 decks
7%synergy
Commander's Insight
10%inclusion3 decks29 decks
10%synergy
Seething Song
10%inclusion3 decks29 decks
5%synergy
Seismic Wave
10%inclusion3 decks29 decks
10%synergy
Undermine
10%inclusion3 decks29 decks
10%synergy
Flusterstorm
10%inclusion3 decks29 decks
2%synergy
Blot Out
10%inclusion3 decks29 decks
10%synergy
Comet Storm
10%inclusion3 decks29 decks
8%synergy
Rewind
10%inclusion3 decks29 decks
9%synergy
Desertion
10%inclusion3 decks29 decks
10%synergy
Pulse of the Forge
10%inclusion3 decks29 decks
10%synergy
Into the Story
10%inclusion3 decks29 decks
10%synergy
Fell the Profane
8.0%inclusion2 decks25 decks
0%synergy
Sorceries
Preordain
31%inclusion9 decks29 decks
25%synergy
Faithless Looting
24%inclusion7 decks29 decks
4%synergy
Toxic Deluge
24%inclusion7 decks29 decks
3%synergy
Temporal Trespass
24%inclusion7 decks29 decks
23%synergy
Circle of Power
21%inclusion4 decks19 decks
18%synergy
Cornered by Black Mages
21%inclusion4 decks19 decks
18%synergy
Browbeat
21%inclusion6 decks29 decks
21%synergy
Reanimate
21%inclusion6 decks29 decks
-3%synergy
Volcanic Vision
21%inclusion6 decks29 decks
20%synergy
Feed the Swarm
17%inclusion5 decks29 decks
-13%synergy
Treasure Cruise
17%inclusion5 decks29 decks
14%synergy
Prisoner's Dilemma
15%inclusion4 decks27 decks
14%synergy
End the Festivities
14%inclusion4 decks29 decks
14%synergy
Sea Gate Restoration
14%inclusion4 decks29 decks
12%synergy
Blood Money
14%inclusion4 decks29 decks
9%synergy
Mana Geyser
14%inclusion4 decks29 decks
9%synergy
Skewer the Critics
14%inclusion4 decks29 decks
14%synergy
Bloodsoaked Insight
12%inclusion3 decks25 decks
10%synergy
Sundering Eruption
12%inclusion3 decks25 decks
10%synergy
Will of the Temur
11%inclusion2 decks19 decks
10%synergy
Cruel Ultimatum
10%inclusion3 decks29 decks
6%synergy
Peer into the Abyss
10%inclusion3 decks29 decks
5%synergy
Lava Spike
10%inclusion3 decks29 decks
10%synergy
Mizzix's Mastery
10%inclusion3 decks29 decks
7%synergy
Unearth
10%inclusion3 decks29 decks
8%synergy
Temporal Mastery
10%inclusion3 decks29 decks
10%synergy
Exsanguinate
10%inclusion3 decks29 decks
7%synergy
Ravenform
10%inclusion3 decks29 decks
10%synergy
Solve the Equation
10%inclusion3 decks29 decks
8%synergy
Blasphemous Edict
8.3%inclusion2 decks24 decks
2%synergy
Wheel of Misfortune
6.9%inclusion2 decks29 decks
2%synergy
Quantum Misalignment
6.9%inclusion2 decks29 decks
5%synergy
Gitaxian Probe
6.9%inclusion2 decks29 decks
1%synergy
Victimize
6.9%inclusion2 decks29 decks
-2%synergy
Agadeem's Awakening
6.9%inclusion2 decks29 decks
5%synergy
Deep Analysis
6.9%inclusion2 decks29 decks
3%synergy
Stitch in Time
6.9%inclusion2 decks29 decks
7%synergy
Temporal Manipulation
6.9%inclusion2 decks29 decks
6%synergy
Demonic Tutor
6.9%inclusion2 decks29 decks
-15%synergy
Light Up the Stage
6.9%inclusion2 decks29 decks
7%synergy
Cut // Ribbons
6.9%inclusion2 decks29 decks
6%synergy
Earthquake
6.9%inclusion2 decks29 decks
7%synergy
Time Reversal
6.9%inclusion2 decks29 decks
5%synergy
Irenicus's Vile Duplication
6.9%inclusion2 decks29 decks
4%synergy
In Garruk's Wake
6.9%inclusion2 decks29 decks
5%synergy
Wheel of Fortune
6.9%inclusion2 decks29 decks
-3%synergy
Beacon of Unrest
6.9%inclusion2 decks29 decks
6%synergy
Sign in Blood
6.9%inclusion2 decks29 decks
3%synergy
Expressive Iteration
6.9%inclusion2 decks29 decks
4%synergy
Kaboom!
6.9%inclusion2 decks29 decks
7%synergy
Utility Artifacts
Basilisk Collar
24%inclusion7 decks29 decks
22%synergy
Black Mage's Rod
21%inclusion4 decks19 decks
18%synergy
Swiftfoot Boots
14%inclusion4 decks29 decks
-12%synergy
The Fire Crystal
11%inclusion2 decks19 decks
8%synergy
Chaos Wand
10%inclusion3 decks29 decks
9%synergy
Shadowspear
10%inclusion3 decks29 decks
7%synergy
Expedition Map
10%inclusion3 decks29 decks
9%synergy
The Magic Mirror
10%inclusion3 decks29 decks
10%synergy
Lightning Greaves
10%inclusion3 decks29 decks
-19%synergy
Sensei's Divining Top
6.9%inclusion2 decks29 decks
4%synergy
The One Ring
6.9%inclusion2 decks29 decks
-6%synergy
Primal Amulet
6.9%inclusion2 decks29 decks
5%synergy
Sapphire Medallion
6.9%inclusion2 decks29 decks
5%synergy
The Darkness Crystal
5.3%inclusion1 decks19 decks
3%synergy
The Masamune
5.3%inclusion1 decks19 decks
5%synergy
Enchantments
Sulfuric Vortex
24%inclusion7 decks29 decks
24%synergy
Mystic Remora
24%inclusion7 decks29 decks
9%synergy
Propaganda
24%inclusion7 decks29 decks
11%synergy
Descent into Avernus
21%inclusion6 decks29 decks
17%synergy
Ophidian Eye
21%inclusion6 decks29 decks
20%synergy
Spellshock
17%inclusion5 decks29 decks
17%synergy
Fevered Visions
17%inclusion5 decks29 decks
13%synergy
Underworld Dreams
17%inclusion5 decks29 decks
10%synergy
Phyrexian Arena
17%inclusion5 decks29 decks
7%synergy
Dictate of the Twin Gods
14%inclusion4 decks29 decks
13%synergy
City on Fire
14%inclusion4 decks29 decks
12%synergy
Fiery Emancipation
14%inclusion4 decks29 decks
12%synergy
Leyline of Anticipation
14%inclusion4 decks29 decks
8%synergy
Painful Quandary
14%inclusion4 decks29 decks
11%synergy
Bloodchief Ascension
14%inclusion4 decks29 decks
9%synergy
Protection Racket
10%inclusion3 decks29 decks
9%synergy
Maddening Hex
10%inclusion3 decks29 decks
9%synergy
Gratuitous Violence
10%inclusion3 decks29 decks
10%synergy
Case of the Ransacked Lab
7.1%inclusion2 decks28 decks
6%synergy
Court of Ire
6.9%inclusion2 decks29 decks
3%synergy
Teferi's Ageless Insight
6.9%inclusion2 decks29 decks
5%synergy
Wizard Class
6.9%inclusion2 decks29 decks
4%synergy
Double Vision
6.9%inclusion2 decks29 decks
4%synergy
Font of Magic
6.9%inclusion2 decks29 decks
7%synergy
Shark Typhoon
6.9%inclusion2 decks29 decks
6%synergy
Spiteful Visions
6.9%inclusion2 decks29 decks
2%synergy
Wound Reflection
6.9%inclusion2 decks29 decks
5%synergy
Ever-Watching Threshold
6.9%inclusion2 decks29 decks
7%synergy
Search for Azcanta
6.9%inclusion2 decks29 decks
6%synergy
Sothera, the Supervoid
5.9%inclusion1 decks17 decks
5%synergy
Planeswalkers
Nicol Bolas, God-Pharaoh
31%inclusion9 decks29 decks
28%synergy
Utility Lands
Reliquary Tower
38%inclusion11 decks29 decks
2%synergy
Mystic Sanctuary
31%inclusion9 decks29 decks
27%synergy
Lindblum, Industrial Regency
21%inclusion4 decks19 decks
17%synergy
Spinerock Knoll
21%inclusion6 decks29 decks
20%synergy
Otawara, Soaring City
21%inclusion6 decks29 decks
5%synergy
Clive's Hideaway
16%inclusion3 decks19 decks
16%synergy
Urborg, Tomb of Yawgmoth
14%inclusion4 decks29 decks
0%synergy
Eden, Seat of the Sanctum
11%inclusion2 decks19 decks
10%synergy
Desolate Lighthouse
10%inclusion3 decks29 decks
4%synergy
Temple of the False God
10%inclusion3 decks29 decks
2%synergy
Witch's Clinic
6.9%inclusion2 decks29 decks
6%synergy
Ancient Tomb
6.9%inclusion2 decks29 decks
-6%synergy
Urza's Saga
6.9%inclusion2 decks29 decks
1%synergy
Field of the Dead
6.9%inclusion2 decks29 decks
6%synergy
Takenuma, Abandoned Mire
6.9%inclusion2 decks29 decks
2%synergy
Susur Secundi, Void Altar
6.7%inclusion1 decks15 decks
5%synergy
Mistrise Village
5.3%inclusion1 decks19 decks
-3%synergy
Cori Mountain Monastery
5.3%inclusion1 decks19 decks
5%synergy
Adventurer's Inn
5.3%inclusion1 decks19 decks
5%synergy
The Gold Saucer
5.3%inclusion1 decks19 decks
5%synergy
Midgar, City of Mako
5.3%inclusion1 decks19 decks
3%synergy
Mana Artifacts
Sol Ring
100%inclusion29 decks29 decks
10%synergy
Arcane Signet
52%inclusion15 decks29 decks
-36%synergy
Commander's Sphere
38%inclusion11 decks29 decks
17%synergy
Talisman of Creativity
31%inclusion9 decks29 decks
-14%synergy
Izzet Signet
31%inclusion9 decks29 decks
-3%synergy
Talisman of Dominance
31%inclusion9 decks29 decks
-18%synergy
Gilded Lotus
31%inclusion9 decks29 decks
28%synergy
Talisman of Indulgence
28%inclusion8 decks29 decks
-15%synergy
Dimir Signet
28%inclusion8 decks29 decks
-9%synergy
Rakdos Signet
24%inclusion7 decks29 decks
-11%synergy
Chromatic Lantern
24%inclusion7 decks29 decks
9%synergy
Decanter of Endless Water
24%inclusion7 decks29 decks
19%synergy
Fellwar Stone
24%inclusion7 decks29 decks
-11%synergy
Thought Vessel
24%inclusion7 decks29 decks
3%synergy
Relic of Legends
17%inclusion5 decks29 decks
16%synergy
Worn Powerstone
14%inclusion4 decks29 decks
9%synergy
Skyclave Relic
14%inclusion4 decks29 decks
13%synergy
Cursed Mirror
10%inclusion3 decks29 decks
5%synergy
Darksteel Ingot
10%inclusion3 decks29 decks
9%synergy
Obelisk of Grixis
10%inclusion3 decks29 decks
8%synergy
Lotus Petal
6.9%inclusion2 decks29 decks
-3%synergy
Victory Chimes
6.9%inclusion2 decks29 decks
7%synergy
All-Fates Scroll
6.7%inclusion1 decks15 decks
6%synergy
Lands
Mountain
97%inclusion28 decks29 decks
5%synergy
Island
97%inclusion28 decks29 decks
4%synergy
Command Tower
93%inclusion27 decks29 decks
1%synergy
Swamp
90%inclusion26 decks29 decks
-2%synergy
Exotic Orchard
83%inclusion24 decks29 decks
26%synergy
Sulfur Falls
62%inclusion18 decks29 decks
16%synergy
Crumbling Necropolis
55%inclusion16 decks29 decks
1%synergy
Drowned Catacomb
52%inclusion15 decks29 decks
9%synergy
Shivan Reef
48%inclusion14 decks29 decks
19%synergy
Dragonskull Summit
45%inclusion13 decks29 decks
0%synergy
Steam Vents
41%inclusion12 decks29 decks
-2%synergy
Blood Crypt
41%inclusion12 decks29 decks
-3%synergy
Dimir Aqueduct
38%inclusion11 decks29 decks
26%synergy
Smoldering Marsh
38%inclusion11 decks29 decks
0%synergy
Xander's Lounge
38%inclusion11 decks29 decks
-3%synergy
Underground River
38%inclusion11 decks29 decks
11%synergy
Sunken Hollow
38%inclusion11 decks29 decks
-2%synergy
Watery Grave
38%inclusion11 decks29 decks
-9%synergy
Seething Landscape
36%inclusion9 decks25 decks
19%synergy
Izzet Boilerworks
34%inclusion10 decks29 decks
23%synergy
Luxury Suite
34%inclusion10 decks29 decks
2%synergy
Morphic Pool
34%inclusion10 decks29 decks
2%synergy
Training Center
34%inclusion10 decks29 decks
2%synergy
Rakdos Carnarium
31%inclusion9 decks29 decks
20%synergy
Stormcarved Coast
31%inclusion9 decks29 decks
6%synergy
Scalding Tarn
31%inclusion9 decks29 decks
-1%synergy
Polluted Delta
31%inclusion9 decks29 decks
-3%synergy
Bloodstained Mire
31%inclusion9 decks29 decks
-3%synergy
Darkwater Catacombs
28%inclusion8 decks29 decks
16%synergy
Temple of Epiphany
28%inclusion8 decks29 decks
13%synergy
Shipwreck Marsh
24%inclusion7 decks29 decks
-1%synergy
Sulfurous Springs
24%inclusion7 decks29 decks
-3%synergy
Oscorp Industries
23%inclusion3 decks13 decks
11%synergy
Tainted Isle
21%inclusion6 decks29 decks
17%synergy
Temple of Deceit
21%inclusion6 decks29 decks
7%synergy
Pinnacle Monk
20%inclusion5 decks25 decks
16%synergy
Temple of Malice
17%inclusion5 decks29 decks
5%synergy
Evolving Wilds
17%inclusion5 decks29 decks
-7%synergy
Path of Ancestry
17%inclusion5 decks29 decks
-14%synergy
Haunted Ridge
17%inclusion5 decks29 decks
-4%synergy
Blazemire Verge
17%inclusion4 decks24 decks
7%synergy
Eroded Canyon
16%inclusion4 decks25 decks
14%synergy
Sink into Stupor
16%inclusion4 decks25 decks
6%synergy
Raucous Theater
14%inclusion4 decks28 decks
4%synergy
Shadowblood Ridge
14%inclusion4 decks29 decks
4%synergy
Sea Gate Restoration
14%inclusion4 decks29 decks
12%synergy
Snow-Covered Island
14%inclusion4 decks29 decks
12%synergy
Cascade Bluffs
14%inclusion4 decks29 decks
3%synergy
City of Brass
14%inclusion4 decks29 decks
1%synergy
Riverpyre Verge
14%inclusion3 decks22 decks
7%synergy