Gandalf the Grey (Commander) - Expensive Upgraded

Background image for The Over/Under - A Review of The Lord of the Rings Commanders
Kyle Massa
Jul 11, 2024
The Over/Under - A Review of The Lord of the Rings Commanders
Which Lord of the Rings commanders have been most popular in practice? Kyle reviews his predictions one year on!
Deck Filters
Cardsphere
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Honest Work
33%inclusion1 decks3 decks
33%synergy
Octopus Form
33%inclusion1 decks3 decks
32%synergy
Longshot, Rebel Bowman
33%inclusion1 decks3 decks
31%synergy
High Synergy Cards
Flame of Anor
100%inclusion9 decks9 decks
88%synergy
Mana Drain
89%inclusion8 decks9 decks
72%synergy
Fiery Inscription
78%inclusion7 decks9 decks
67%synergy
Dualcaster Mage
67%inclusion6 decks9 decks
58%synergy
Ghostly Flicker
56%inclusion5 decks9 decks
54%synergy
Gandalf's Sanction
56%inclusion5 decks9 decks
53%synergy
Displacer Kitten
56%inclusion5 decks9 decks
52%synergy
Borne Upon a Wind
56%inclusion5 decks9 decks
48%synergy
Archmage Emeritus
78%inclusion7 decks9 decks
43%synergy
Glamdring
44%inclusion4 decks9 decks
43%synergy
Top Cards
Frantic Search
67%inclusion6 decks9 decks
26%synergy
Preordain
67%inclusion6 decks9 decks
32%synergy
Counterspell
67%inclusion6 decks9 decks
14%synergy
Blasphemous Act
67%inclusion6 decks9 decks
28%synergy
Storm-Kiln Artist
67%inclusion6 decks9 decks
28%synergy
Ponder
56%inclusion5 decks9 decks
17%synergy
Solve the Equation
56%inclusion5 decks9 decks
42%synergy
Harmonic Prodigy
56%inclusion5 decks9 decks
38%synergy
Lightning Bolt
56%inclusion5 decks9 decks
27%synergy
Chaos Warp
44%inclusion4 decks9 decks
1%synergy
Game Changers
Jeska's Will
56%inclusion5 decks9 decks
26%synergy
Cyclonic Rift
44%inclusion4 decks9 decks
18%synergy
Fierce Guardianship
33%inclusion3 decks9 decks
12%synergy
Mystical Tutor
22%inclusion2 decks9 decks
0%synergy
Underworld Breach
11%inclusion1 decks9 decks
-1%synergy
Consecrated Sphinx
11%inclusion1 decks9 decks
7%synergy
Intuition
11%inclusion1 decks9 decks
9%synergy
Mana Vault
11%inclusion1 decks9 decks
2%synergy
Force of Will
11%inclusion1 decks9 decks
-2%synergy
Gamble
11%inclusion1 decks9 decks
-6%synergy
Creatures
Spellseeker
44%inclusion4 decks9 decks
39%synergy
Archaeomancer
44%inclusion4 decks9 decks
42%synergy
Veyran, Voice of Duality
44%inclusion4 decks9 decks
25%synergy
Baral, Chief of Compliance
44%inclusion4 decks9 decks
35%synergy
Guttersnipe
44%inclusion4 decks9 decks
18%synergy
Snapcaster Mage
33%inclusion3 decks9 decks
30%synergy
Niv-Mizzet, Parun
33%inclusion3 decks9 decks
4%synergy
Coruscation Mage
33%inclusion3 decks9 decks
12%synergy
Alania, Divergent Storm
33%inclusion3 decks9 decks
29%synergy
Erebor Flamesmith
33%inclusion3 decks9 decks
25%synergy
Gandalf, Friend of the Shire
33%inclusion3 decks9 decks
32%synergy
Goblin Electromancer
33%inclusion3 decks9 decks
4%synergy
Talrand, Sky Summoner
33%inclusion3 decks9 decks
16%synergy
Vivi Ornitier
29%inclusion2 decks7 decks
18%synergy
Azami, Lady of Scrolls
22%inclusion2 decks9 decks
21%synergy
Young Pyromancer
22%inclusion2 decks9 decks
4%synergy
Stormcatch Mentor
22%inclusion2 decks9 decks
1%synergy
Pinnacle Monk
22%inclusion2 decks9 decks
10%synergy
Kaza, Roil Chaser
22%inclusion2 decks9 decks
20%synergy
Jori En, Ruin Diver
22%inclusion2 decks9 decks
16%synergy
Exalted Flamer of Tzeentch
22%inclusion2 decks9 decks
13%synergy
Birgi, God of Storytelling
22%inclusion2 decks9 decks
7%synergy
Naru Meha, Master Wizard
22%inclusion2 decks9 decks
21%synergy
The Reality Chip
22%inclusion2 decks9 decks
17%synergy
Balmor, Battlemage Captain
22%inclusion2 decks9 decks
12%synergy
Solphim, Mayhem Dominus
22%inclusion2 decks9 decks
20%synergy
Glasspool Mimic
22%inclusion2 decks9 decks
20%synergy
Gogo, Master of Mimicry
14%inclusion1 decks7 decks
13%synergy
Hermes, Overseer of Elpis
14%inclusion1 decks7 decks
13%synergy
Mysidian Elder
14%inclusion1 decks7 decks
12%synergy
Trophy Mage
11%inclusion1 decks9 decks
10%synergy
Pink Horror
11%inclusion1 decks9 decks
9%synergy
Purphoros, God of the Forge
11%inclusion1 decks9 decks
9%synergy
Malevolent Hermit
11%inclusion1 decks9 decks
10%synergy
Hydroelectric Specimen
11%inclusion1 decks9 decks
4%synergy
Wandering Archaic
11%inclusion1 decks9 decks
10%synergy
Adeliz, the Cinder Wind
11%inclusion1 decks9 decks
10%synergy
Docent of Perfection
11%inclusion1 decks9 decks
9%synergy
Saruman the White
11%inclusion1 decks9 decks
11%synergy
Vadrik, Astral Archmage
11%inclusion1 decks9 decks
10%synergy
Jhoira of the Ghitu
11%inclusion1 decks9 decks
11%synergy
Gadwick, the Wizened
11%inclusion1 decks9 decks
11%synergy
Hullbreaker Horror
11%inclusion1 decks9 decks
5%synergy
Meneldor, Swift Savior
11%inclusion1 decks9 decks
11%synergy
Bothersome Quasit
11%inclusion1 decks9 decks
9%synergy
Melek, Izzet Paragon
11%inclusion1 decks9 decks
7%synergy
Thassa, Deep-Dwelling
11%inclusion1 decks9 decks
11%synergy
Mulldrifter
11%inclusion1 decks9 decks
10%synergy
Archmage of Runes
11%inclusion1 decks9 decks
-1%synergy
Najal, the Storm Runner
11%inclusion1 decks9 decks
10%synergy
Instants
Opt
44%inclusion4 decks9 decks
8%synergy
Brainstorm
44%inclusion4 decks9 decks
0%synergy
Sink into Stupor
44%inclusion4 decks9 decks
28%synergy
Essence Flux
33%inclusion3 decks9 decks
32%synergy
Swan Song
33%inclusion3 decks9 decks
12%synergy
Planar Incision
33%inclusion3 decks9 decks
33%synergy
Snap
33%inclusion3 decks9 decks
10%synergy
Narset's Reversal
33%inclusion3 decks9 decks
25%synergy
Vivi's Persistence
33%inclusion1 decks3 decks
33%synergy
Arcane Denial
33%inclusion3 decks9 decks
4%synergy
Expansion // Explosion
33%inclusion3 decks9 decks
27%synergy
Consider
22%inclusion2 decks9 decks
0%synergy
Reality Shift
22%inclusion2 decks9 decks
8%synergy
Pyretic Ritual
22%inclusion2 decks9 decks
14%synergy
Deflecting Swat
22%inclusion2 decks9 decks
2%synergy
High Tide
22%inclusion2 decks9 decks
18%synergy
Blur
22%inclusion2 decks9 decks
21%synergy
Untimely Malfunction
22%inclusion2 decks9 decks
14%synergy
Desperate Ritual
22%inclusion2 decks9 decks
14%synergy
Seething Song
22%inclusion2 decks9 decks
4%synergy
Twincast
22%inclusion2 decks9 decks
21%synergy
Display of Power
22%inclusion2 decks9 decks
20%synergy
Reverberate
22%inclusion2 decks9 decks
18%synergy
Pull from Tomorrow
22%inclusion2 decks9 decks
16%synergy
Galvanic Iteration
22%inclusion2 decks9 decks
12%synergy
Teferi's Time Twist
22%inclusion2 decks9 decks
22%synergy
Flare of Duplication
22%inclusion2 decks9 decks
18%synergy
Prismari Command
22%inclusion2 decks9 decks
6%synergy
Reiterate
22%inclusion2 decks9 decks
17%synergy
Fork
22%inclusion2 decks9 decks
22%synergy
Fading Hope
22%inclusion2 decks9 decks
21%synergy
Invert Polarity
22%inclusion2 decks9 decks
10%synergy
Turnabout
22%inclusion2 decks9 decks
20%synergy
Cast into the Fire
22%inclusion2 decks9 decks
19%synergy
Dramatic Reversal
22%inclusion2 decks9 decks
11%synergy
Magic Damper
14%inclusion1 decks7 decks
7%synergy
Negate
11%inclusion1 decks9 decks
-23%synergy
Electrodominance
11%inclusion1 decks9 decks
5%synergy
Flusterstorm
11%inclusion1 decks9 decks
-1%synergy
Delayed Blast Fireball
11%inclusion1 decks9 decks
7%synergy
Silundi Vision
11%inclusion1 decks9 decks
6%synergy
Wizard's Retort
11%inclusion1 decks9 decks
9%synergy
Whirlwind Denial
11%inclusion1 decks9 decks
10%synergy
Annul
11%inclusion1 decks9 decks
10%synergy
Artistic Refusal
11%inclusion1 decks9 decks
10%synergy
Geistblast
11%inclusion1 decks9 decks
11%synergy
Stonesplitter Bolt
11%inclusion1 decks9 decks
11%synergy
An Offer You Can't Refuse
11%inclusion1 decks9 decks
-24%synergy
Council's Deliberation
11%inclusion1 decks9 decks
11%synergy
Displace
11%inclusion1 decks9 decks
11%synergy
Sorceries
Windfall
44%inclusion4 decks9 decks
17%synergy
Expressive Iteration
44%inclusion4 decks9 decks
22%synergy
Crackle with Power
33%inclusion3 decks9 decks
26%synergy
Sea Gate Restoration
33%inclusion3 decks9 decks
25%synergy
Will of the Jeskai
29%inclusion2 decks7 decks
22%synergy
Mizzium Mortars
22%inclusion2 decks9 decks
19%synergy
Gitaxian Probe
22%inclusion2 decks9 decks
1%synergy
Vandalblast
22%inclusion2 decks9 decks
-5%synergy
Mizzix's Mastery
22%inclusion2 decks9 decks
3%synergy
Lórien Revealed
22%inclusion2 decks9 decks
16%synergy
Shatterskull Smashing
22%inclusion2 decks9 decks
17%synergy
Mana Geyser
22%inclusion2 decks9 decks
2%synergy
Serum Visions
22%inclusion2 decks9 decks
4%synergy
Merchant Scroll
22%inclusion2 decks9 decks
17%synergy
Rite of Flame
22%inclusion2 decks9 decks
13%synergy
Grapeshot
22%inclusion2 decks9 decks
3%synergy
Jaya's Immolating Inferno
22%inclusion2 decks9 decks
17%synergy
Wheel of Misfortune
11%inclusion1 decks9 decks
7%synergy
Arwen's Gift
11%inclusion1 decks9 decks
11%synergy
Wheel of Fate
11%inclusion1 decks9 decks
10%synergy
Splash Portal
11%inclusion1 decks9 decks
10%synergy
Slagstorm
11%inclusion1 decks9 decks
10%synergy
Past in Flames
11%inclusion1 decks9 decks
0%synergy
Faithless Looting
11%inclusion1 decks9 decks
-22%synergy
Birthday Escape
11%inclusion1 decks9 decks
10%synergy
Rousing Refrain
11%inclusion1 decks9 decks
6%synergy
Curse of the Swine
11%inclusion1 decks9 decks
5%synergy
Clone Legion
11%inclusion1 decks9 decks
9%synergy
Pirate's Pillage
11%inclusion1 decks9 decks
6%synergy
Ancestral Vision
11%inclusion1 decks9 decks
10%synergy
Earthquake
11%inclusion1 decks9 decks
10%synergy
Boltwave
11%inclusion1 decks9 decks
4%synergy
Sundering Eruption
11%inclusion1 decks9 decks
6%synergy
Time Spiral
11%inclusion1 decks9 decks
10%synergy
Finale of Promise
11%inclusion1 decks9 decks
7%synergy
Prisoner's Dilemma
11%inclusion1 decks9 decks
9%synergy
Chain Reaction
11%inclusion1 decks9 decks
5%synergy
Epic Experiment
11%inclusion1 decks9 decks
5%synergy
Immolating Gyre
11%inclusion1 decks9 decks
10%synergy
Stock Up
11%inclusion1 decks9 decks
7%synergy
Temporal Mastery
11%inclusion1 decks9 decks
9%synergy
Time Stretch
11%inclusion1 decks9 decks
8%synergy
Wheel of Fortune
11%inclusion1 decks9 decks
4%synergy
Inevitable Betrayal
11%inclusion1 decks9 decks
10%synergy
Mystic Retrieval
11%inclusion1 decks9 decks
6%synergy
Strike It Rich
11%inclusion1 decks9 decks
0%synergy
Time Warp
11%inclusion1 decks9 decks
8%synergy
Portent
11%inclusion1 decks9 decks
10%synergy
Winds of Change
11%inclusion1 decks9 decks
8%synergy
Sleight of Hand
11%inclusion1 decks9 decks
7%synergy
Utility Artifacts
Sensei's Divining Top
33%inclusion3 decks9 decks
26%synergy
Twinning Staff
33%inclusion3 decks9 decks
30%synergy
Primal Amulet
33%inclusion3 decks9 decks
28%synergy
Ruby Medallion
22%inclusion2 decks9 decks
13%synergy
Conjurer's Closet
22%inclusion2 decks9 decks
22%synergy
Isochron Scepter
22%inclusion2 decks9 decks
14%synergy
Sapphire Medallion
22%inclusion2 decks9 decks
14%synergy
Lithoform Engine
11%inclusion1 decks9 decks
10%synergy
Vedalken Orrery
11%inclusion1 decks9 decks
10%synergy
Wizard's Spellbook
11%inclusion1 decks9 decks
9%synergy
Mithril Coat
11%inclusion1 decks9 decks
7%synergy
Mindsplice Apparatus
11%inclusion1 decks9 decks
6%synergy
Scroll Rack
11%inclusion1 decks9 decks
10%synergy
Horn of Gondor
11%inclusion1 decks9 decks
11%synergy
Sword of Hearth and Home
11%inclusion1 decks9 decks
11%synergy
Basilisk Collar
11%inclusion1 decks9 decks
3%synergy
Chaos Wand
11%inclusion1 decks9 decks
10%synergy
God-Pharaoh's Statue
11%inclusion1 decks9 decks
11%synergy
The Millennium Calendar
11%inclusion1 decks9 decks
11%synergy
The One Ring
11%inclusion1 decks9 decks
1%synergy
Robe of the Archmagi
11%inclusion1 decks9 decks
9%synergy
Mimic Vat
11%inclusion1 decks9 decks
10%synergy
Panharmonicon
11%inclusion1 decks9 decks
10%synergy
Swiftfoot Boots
11%inclusion1 decks9 decks
-18%synergy
Lightning Greaves
11%inclusion1 decks9 decks
-13%synergy
Enchantments
Thousand-Year Storm
33%inclusion3 decks9 decks
17%synergy
Mystic Remora
22%inclusion2 decks9 decks
2%synergy
Eye of the Storm
11%inclusion1 decks9 decks
10%synergy
Counterbalance
11%inclusion1 decks9 decks
10%synergy
Curiosity
11%inclusion1 decks9 decks
-14%synergy
Wizard Class
11%inclusion1 decks9 decks
3%synergy
Gratuitous Violence
11%inclusion1 decks9 decks
10%synergy
Shark Typhoon
11%inclusion1 decks9 decks
4%synergy
Eaten by Piranhas
11%inclusion1 decks9 decks
10%synergy
Fortune Teller's Talent
11%inclusion1 decks9 decks
10%synergy
Swarm Intelligence
11%inclusion1 decks9 decks
8%synergy
Rite of the Dragoncaller
11%inclusion1 decks9 decks
5%synergy
Fiery Emancipation
11%inclusion1 decks9 decks
8%synergy
Unifying Theory
11%inclusion1 decks9 decks
11%synergy
Leyline of Anticipation
11%inclusion1 decks9 decks
8%synergy
Amphibian Downpour
11%inclusion1 decks9 decks
8%synergy
Ophidian Eye
11%inclusion1 decks9 decks
-3%synergy
Candlekeep Sage
11%inclusion1 decks9 decks
11%synergy
Stormchaser's Talent
11%inclusion1 decks9 decks
5%synergy
Sorcerer Class
11%inclusion1 decks9 decks
3%synergy
Rhystic Study
11%inclusion1 decks9 decks
-14%synergy
Metallurgic Summonings
11%inclusion1 decks9 decks
7%synergy
Fable of the Mirror-Breaker
11%inclusion1 decks9 decks
10%synergy
Propaganda
11%inclusion1 decks9 decks
-4%synergy
Battles
Invasion of Karsus
11%inclusion1 decks9 decks
11%synergy
Planeswalkers
Ral, Storm Conduit
22%inclusion2 decks9 decks
13%synergy
Ral, Crackling Wit
11%inclusion1 decks9 decks
-1%synergy
Narset, Parter of Veils
11%inclusion1 decks9 decks
7%synergy
Utility Lands
Mystic Sanctuary
67%inclusion6 decks9 decks
41%synergy
Reliquary Tower
67%inclusion6 decks9 decks
17%synergy
Otawara, Soaring City
56%inclusion5 decks9 decks
37%synergy
Riptide Laboratory
44%inclusion4 decks9 decks
39%synergy
Temple of the False God
33%inclusion3 decks9 decks
24%synergy
Mistrise Village
29%inclusion2 decks7 decks
13%synergy
Forgotten Cave
22%inclusion2 decks9 decks
15%synergy
Desolate Lighthouse
22%inclusion2 decks9 decks
12%synergy
Restless Spire
22%inclusion2 decks9 decks
17%synergy
Emergence Zone
22%inclusion2 decks9 decks
19%synergy
Lonely Sandbar
22%inclusion2 decks9 decks
16%synergy
Lindblum, Industrial Regency
14%inclusion1 decks7 decks
5%synergy
Lotus Field
11%inclusion1 decks9 decks
11%synergy
Diamond City
11%inclusion1 decks9 decks
11%synergy
Sokenzan, Crucible of Defiance
11%inclusion1 decks9 decks
7%synergy
Cephalid Coliseum
11%inclusion1 decks9 decks
5%synergy
Urza's Saga
11%inclusion1 decks9 decks
2%synergy
Great Hall of the Citadel
11%inclusion1 decks9 decks
11%synergy
Rivendell
11%inclusion1 decks9 decks
7%synergy
Boseiju, Who Shelters All
11%inclusion1 decks9 decks
10%synergy
Tolaria West
11%inclusion1 decks9 decks
9%synergy
The Biblioplex
11%inclusion1 decks9 decks
11%synergy
Nivix, Aerie of the Firemind
11%inclusion1 decks9 decks
11%synergy
Mana Artifacts
Arcane Signet
100%inclusion9 decks9 decks
16%synergy
Sol Ring
100%inclusion9 decks9 decks
13%synergy
Thought Vessel
44%inclusion4 decks9 decks
8%synergy
Talisman of Creativity
44%inclusion4 decks9 decks
-10%synergy
Izzet Signet
44%inclusion4 decks9 decks
-16%synergy
Fellwar Stone
33%inclusion3 decks9 decks
1%synergy
Gilded Lotus
33%inclusion3 decks9 decks
27%synergy
Lotus Petal
22%inclusion2 decks9 decks
9%synergy
Cursed Mirror
22%inclusion2 decks9 decks
15%synergy
Midnight Clock
22%inclusion2 decks9 decks
11%synergy
Basalt Monolith
11%inclusion1 decks9 decks
9%synergy
Mind Stone
11%inclusion1 decks9 decks
-14%synergy
Mox Opal
11%inclusion1 decks9 decks
3%synergy
Pyromancer's Goggles
11%inclusion1 decks9 decks
7%synergy
Glittering Stockpile
11%inclusion1 decks9 decks
9%synergy
Lotus Bloom
11%inclusion1 decks9 decks
10%synergy
Commander's Sphere
11%inclusion1 decks9 decks
-5%synergy
Vessel of Endless Rest
11%inclusion1 decks9 decks
11%synergy
Mox Amber
11%inclusion1 decks9 decks
2%synergy
Decanter of Endless Water
11%inclusion1 decks9 decks
1%synergy
Springleaf Drum
11%inclusion1 decks9 decks
7%synergy
Paradise Mantle
11%inclusion1 decks9 decks
10%synergy
Prismatic Lens
11%inclusion1 decks9 decks
9%synergy
Lands
Command Tower
100%inclusion9 decks9 decks
13%synergy
Steam Vents
100%inclusion9 decks9 decks
53%synergy
Island
100%inclusion9 decks9 decks
2%synergy
Mountain
100%inclusion9 decks9 decks
3%synergy
Sulfur Falls
89%inclusion8 decks9 decks
24%synergy
Shivan Reef
89%inclusion8 decks9 decks
30%synergy
Training Center
78%inclusion7 decks9 decks
34%synergy
Scalding Tarn
67%inclusion6 decks9 decks
36%synergy
Fiery Islet
67%inclusion6 decks9 decks
40%synergy
Volcanic Island
67%inclusion6 decks9 decks
52%synergy
Stormcarved Coast
56%inclusion5 decks9 decks
15%synergy
Izzet Boilerworks
56%inclusion5 decks9 decks
16%synergy
Temple of Epiphany
44%inclusion4 decks9 decks
3%synergy
Exotic Orchard
44%inclusion4 decks9 decks
11%synergy
Riverglide Pathway
44%inclusion4 decks9 decks
20%synergy
Frostboil Snarl
44%inclusion4 decks9 decks
1%synergy
Sink into Stupor
44%inclusion4 decks9 decks
28%synergy
Cascade Bluffs
44%inclusion4 decks9 decks
2%synergy
Path of Ancestry
33%inclusion3 decks9 decks
19%synergy
Thundering Falls
33%inclusion3 decks9 decks
13%synergy
Polluted Delta
33%inclusion3 decks9 decks
22%synergy
Sea Gate Restoration
33%inclusion3 decks9 decks
25%synergy
Flooded Strand
33%inclusion3 decks9 decks
22%synergy
Misty Rainforest
22%inclusion2 decks9 decks
12%synergy
Pinnacle Monk
22%inclusion2 decks9 decks
10%synergy
Shatterskull Smashing
22%inclusion2 decks9 decks
17%synergy
Spirebluff Canal
22%inclusion2 decks9 decks
8%synergy
Myriad Landscape
22%inclusion2 decks9 decks
5%synergy
Glasspool Mimic
22%inclusion2 decks9 decks
20%synergy
Hydroelectric Specimen
11%inclusion1 decks9 decks
4%synergy
Ash Barrens
11%inclusion1 decks9 decks
6%synergy
Ferrous Lake
11%inclusion1 decks9 decks
-13%synergy
Wooded Foothills
11%inclusion1 decks9 decks
2%synergy
Silundi Vision
11%inclusion1 decks9 decks
6%synergy
Arid Mesa
11%inclusion1 decks9 decks
2%synergy
Sundering Eruption
11%inclusion1 decks9 decks
6%synergy
Mana Confluence
11%inclusion1 decks9 decks
4%synergy
Terramorphic Expanse
11%inclusion1 decks9 decks
-1%synergy
Prismari Campus
11%inclusion1 decks9 decks
6%synergy
Cavern of Souls
11%inclusion1 decks9 decks
7%synergy
Talon Gates of Madara
11%inclusion1 decks9 decks
10%synergy
Volatile Fjord
11%inclusion1 decks9 decks
6%synergy
Plaza of Heroes
11%inclusion1 decks9 decks
9%synergy
Evolving Wilds
11%inclusion1 decks9 decks
-7%synergy
Bloodstained Mire
11%inclusion1 decks9 decks
1%synergy
Valakut Awakening
11%inclusion1 decks9 decks
1%synergy
Molten Tributary
11%inclusion1 decks9 decks
2%synergy
Gemstone Caverns
11%inclusion1 decks9 decks
4%synergy