Niv-Mizzet, the Firemind + Ophidian Eye
Niv-Mizzet, the Firemind
Ophidian Eye
Requires
Niv-Mizzet, the Firemind must be on the battlefield.
Ophidian Eye must be on the battlefield.
Ophidian Eye attached to Niv-Mizzet.
You have a way to draw a card.
Steps
- Draw a card.
- Niv-Mizzet triggers, dealing 1 damage to an opponent.
- Ophidian Eye triggers, allowing you to draw a card.
- Repeat from step 2.
Results
Infinite card draw. Infinite draw triggers. Near-infinite damage.
Niv-Mizzet, Visionary
5.90% of 2493 decks
147 decks
Top Commanders
Ghyrson Starn, Kelermorph
31.82% of 15729 decks
5005 decks
Niv-Mizzet, Parun
25.58% of 14747 decks
3772 decks
Brallin, Skyshark Rider // Shabraz, the Skyshark
13.87% of 2834 decks
393 decks
Niv-Mizzet, the Firemind
41.68% of 895 decks
373 decks
The Locust God
3.61% of 5630 decks
203 decks
Nekusar, the Mindrazer
0.76% of 18745 decks
142 decks
River Song
3.58% of 2236 decks
80 decks
Kediss, Emberclaw Familiar // Malcolm, Keen-Eyed Navigator
2.16% of 3049 decks
66 decks
Scion of the Ur-Dragon
2.10% of 2664 decks
56 decks
Arjun, the Shifting Flame
2.87% of 1813 decks
52 decks
Gavi, Nest Warden
1.28% of 3837 decks
49 decks
Rielle, the Everwise
2.09% of 2252 decks
47 decks
Yusri, Fortune's Flame
1.30% of 2620 decks
34 decks
Xyris, the Writhing Storm
0.28% of 11274 decks
32 decks
Nin, the Pain Artist
3.47% of 864 decks
30 decks
Breeches, Brazen Plunderer // Malcolm, Keen-Eyed Navigator
0.83% of 3487 decks
29 decks
Stella Lee, Wild Card
0.33% of 8429 decks
28 decks
New Cards
Uncharted Voyage
100% of 3 decks
+1% synergy
Crackling Cyclops
81% of 26 decks
+57% synergy
Niv-Mizzet, Visionary
70% of 860 decks
+60% synergy
Strix Lookout
69% of 48 decks
+54% synergy
Boltwave
65% of 285 decks
+46% synergy
High Synergy Cards
Curiosity
97% of 11354 decks
+93% synergy
Tandem Lookout
72% of 11346 decks
+71% synergy
Coruscation Mage
63% of 2226 decks
+57% synergy
Keen Sense
56% of 307 decks
+54% synergy
Brainstorm
72% of 11354 decks
+51% synergy
Niv-Mizzet, Parun
58% of 11319 decks
+49% synergy
Electrostatic Field
50% of 11319 decks
+47% synergy
Opt
55% of 11354 decks
+45% synergy
Thermo-Alchemist
48% of 11330 decks
+45% synergy
Kessig Flamebreather
47% of 10987 decks
+44% synergy
Top Cards
Counterspell
77% of 11354 decks
+34% synergy
Swords to Plowshares
64% of 674 decks
+1% synergy
Negate
58% of 11354 decks
+36% synergy
Rite of the Dragoncaller
55% of 285 decks
+43% synergy
Ponder
54% of 11354 decks
+41% synergy
Preordain
54% of 11354 decks
+43% synergy
Path to Exile
51% of 674 decks
+5% synergy
Incinerating Blast
50% of 26 decks
+31% synergy
Archmage Emeritus
48% of 11150 decks
+40% synergy
Basilisk Collar
48% of 11354 decks
+44% synergy
Creatures
Razorkin Needlehead
45% of 1447 decks
+37% synergy
Erebor Flamesmith
43% of 7056 decks
+40% synergy
Firespitter Whelp
43% of 500 decks
+39% synergy
Firebrand Archer
43% of 11324 decks
+40% synergy
Exalted Flamer of Tzeentch
41% of 10233 decks
+37% synergy
Storm-Kiln Artist
40% of 11150 decks
+31% synergy
Gelectrode
38% of 11354 decks
+37% synergy
Goblin Electromancer
36% of 11346 decks
+27% synergy
Unruly Catapult
36% of 6310 decks
+34% synergy
Birds of Paradise
35% of 307 decks
+7% synergy
Orcish Bowmasters
34% of 244 decks
+23% synergy
Fate Unraveler
32% of 410 decks
+30% synergy
Chandra's Incinerator
31% of 11209 decks
+29% synergy
The Locust God
30% of 11324 decks
+26% synergy
Third Path Iconoclast
30% of 9720 decks
+23% synergy
Guttersnipe
29% of 11346 decks
+23% synergy
Young Pyromancer
29% of 11344 decks
+24% synergy
Urabrask
29% of 8270 decks
+25% synergy
Psychosis Crawler
26% of 11353 decks
+23% synergy
Faeburrow Elder
26% of 138 decks
+15% synergy
Kiora's Follower
25% of 307 decks
+20% synergy
Scalding Viper
25% of 6513 decks
+23% synergy
Esper Sentinel
25% of 654 decks
+4% synergy
Goblin Chainwhirler
25% of 11321 decks
+24% synergy
Seedborn Muse
24% of 307 decks
+16% synergy
Sheoldred, the Apocalypse
24% of 346 decks
+18% synergy
Dragonlord Dromoka
23% of 138 decks
+20% synergy
Bloom Tender
23% of 307 decks
+15% synergy
Stormcatch Mentor
23% of 2356 decks
+12% synergy
Ignoble Hierarch
23% of 146 decks
-3% synergy
Agate Instigator
22% of 1699 decks
+15% synergy
Nightscape Familiar
22% of 410 decks
+20% synergy
Ojer Axonil, Deepest Might
22% of 5693 decks
+19% synergy
Goblin Sharpshooter
22% of 11354 decks
+21% synergy
Laboratory Maniac
21% of 11346 decks
+17% synergy
Kederekt Parasite
21% of 410 decks
+20% synergy
Razorfin Hunter
20% of 11354 decks
+20% synergy
Talrand, Sky Summoner
20% of 11346 decks
+15% synergy
Cinder Pyromancer
20% of 11354 decks
+19% synergy
Teneb, the Harvester
20% of 128 decks
+17% synergy
Molten Gatekeeper
19% of 2681 decks
+14% synergy
Harmonic Prodigy
19% of 11104 decks
+15% synergy
Archmage of Runes
19% of 860 decks
+9% synergy
The Ur-Dragon
18% of 128 decks
+16% synergy
Saryth, the Viper's Fang
18% of 290 decks
+14% synergy
Gleeful Arsonist
18% of 1079 decks
+11% synergy
Niv-Mizzet, Supreme
17% of 87 decks
+16% synergy
Baral, Chief of Compliance
17% of 11328 decks
+14% synergy
Elementalist Adept
17% of 48 decks
+11% synergy
Noble Hierarch
17% of 138 decks
+1% synergy
Instants
Chaos Warp
47% of 11350 decks
+15% synergy
Frantic Search
42% of 11354 decks
+30% synergy
Arcane Denial
41% of 11354 decks
+21% synergy
Dovin's Veto
40% of 671 decks
+21% synergy
Faithful Mending
39% of 647 decks
+37% synergy
Electrickery
39% of 11346 decks
+38% synergy
An Offer You Can't Refuse
38% of 10828 decks
+17% synergy
Heartwarming Redemption
37% of 671 decks
+37% synergy
Electrolyze
34% of 11354 decks
+33% synergy
Izzet Charm
33% of 11346 decks
+28% synergy
Cyclonic Rift
31% of 11346 decks
+4% synergy
Spikefield Hazard
28% of 11202 decks
+26% synergy
Beast Within
27% of 307 decks
-11% synergy
Dramatic Reversal
26% of 11330 decks
+21% synergy
Gut Shot
26% of 11353 decks
+25% synergy
Mystical Tutor
25% of 11354 decks
+10% synergy
Pongify
24% of 11354 decks
+13% synergy
Assassin's Trophy
24% of 150 decks
-6% synergy
Consider
23% of 11033 decks
+17% synergy
Cast into the Fire
23% of 7677 decks
+22% synergy
Needle Drop
23% of 11354 decks
+22% synergy
Vampiric Tutor
23% of 410 decks
+5% synergy
Refute
22% of 541 decks
+15% synergy
Untimely Malfunction
22% of 1225 decks
+6% synergy
Terminate
21% of 410 decks
+0% synergy
Swan Song
21% of 11344 decks
+5% synergy
Thrill of Possibility
21% of 11271 decks
+11% synergy
Lightning Bolt
21% of 11354 decks
+10% synergy
Generous Gift
21% of 671 decks
-5% synergy
Fierce Guardianship
20% of 11237 decks
+2% synergy
Enlightened Tutor
20% of 674 decks
+2% synergy
Heroic Intervention
20% of 305 decks
-10% synergy
Dark Ritual
19% of 410 decks
-3% synergy
Flame of Anor
19% of 7341 decks
+14% synergy
Anguished Unmaking
19% of 138 decks
-5% synergy
Invert Polarity
19% of 2894 decks
+13% synergy
Rapid Hybridization
18% of 11345 decks
+9% synergy
Growth Spiral
18% of 305 decks
-4% synergy
Mana Drain
17% of 11354 decks
+2% synergy
Quick Study
16% of 6310 decks
+14% synergy
Deflecting Swat
16% of 11237 decks
-1% synergy
Planar Genesis
16% of 58 decks
+8% synergy
Dawn's Truce
15% of 71 decks
-0% synergy
Boros Charm
15% of 672 decks
-10% synergy
Abrade
15% of 11324 decks
+3% synergy
Worldly Tutor
15% of 307 decks
+1% synergy
Rakdos Charm
15% of 410 decks
+0% synergy
Strix Serenade
14% of 2988 decks
+8% synergy
Rewind
14% of 11354 decks
+11% synergy
Teferi's Protection
14% of 671 decks
-6% synergy
Sorceries
Farseek
44% of 307 decks
+10% synergy
Tectonic Hazard
44% of 5016 decks
+41% synergy
End the Festivities
44% of 10987 decks
+42% synergy
Windfall
42% of 11354 decks
+29% synergy
Grapeshot
42% of 11354 decks
+37% synergy
Cultivate
41% of 307 decks
-5% synergy
Smash to Dust
39% of 10520 decks
+38% synergy
Blazing Volley
38% of 11326 decks
+37% synergy
Faithless Looting
38% of 11346 decks
+21% synergy
Blasphemous Act
36% of 11346 decks
+3% synergy
Vandalblast
35% of 11346 decks
+19% synergy
Nature's Lore
33% of 307 decks
+1% synergy
Kodama's Reach
29% of 307 decks
-2% synergy
Rampant Growth
29% of 307 decks
-6% synergy
Jeska's Will
28% of 11194 decks
+11% synergy
Demonic Tutor
28% of 410 decks
+6% synergy
Three Visits
26% of 307 decks
+1% synergy
Scouring Sands
26% of 11343 decks
+25% synergy
Whispering Madness
24% of 410 decks
+22% synergy
Playful Shove
24% of 1806 decks
+22% synergy
Serum Visions
23% of 11354 decks
+18% synergy
Treasure Cruise
23% of 11340 decks
+17% synergy
Gitaxian Probe
22% of 11353 decks
+16% synergy
Dark Deal
22% of 409 decks
+19% synergy
Flame Fusillade
21% of 11354 decks
+21% synergy
Peer into the Abyss
21% of 403 decks
+18% synergy
Sevinne's Reclamation
19% of 671 decks
+12% synergy
Expressive Iteration
17% of 11150 decks
+11% synergy
Fear, Fire, Foes!
15% of 7413 decks
+15% synergy
Idyllic Tutor
15% of 674 decks
+10% synergy
Diabolic Tutor
14% of 410 decks
+8% synergy
Gamble
14% of 11354 decks
+4% synergy
Akroma's Vengeance
13% of 674 decks
+12% synergy
Reanimate
12% of 410 decks
-3% synergy
Toxic Deluge
12% of 410 decks
-5% synergy
Dismantling Wave
12% of 671 decks
+11% synergy
Supreme Verdict
12% of 672 decks
-2% synergy
Crux of Fate
12% of 409 decks
+9% synergy
Mana Geyser
11% of 11354 decks
+5% synergy
Solve the Equation
11% of 11150 decks
+7% synergy
Mizzix's Mastery
11% of 11335 decks
+7% synergy
Feed the Swarm
10% of 401 decks
-8% synergy
Grab the Prize
9% of 1164 decks
+2% synergy
Boiling Earth
9% of 11337 decks
+9% synergy
Enter the Enigma
9% of 1108 decks
+1% synergy
Insatiable Avarice
9% of 98 decks
+4% synergy
Skyshroud Claim
9% of 307 decks
-0% synergy
Approach of the Second Sun
9% of 671 decks
+5% synergy
Merciless Eviction
9% of 138 decks
+4% synergy
Hull Breach
8% of 307 decks
+4% synergy
Utility Artifacts
Swiftfoot Boots
47% of 11350 decks
+19% synergy
Lightning Greaves
37% of 11354 decks
+12% synergy
Gorgon's Head
28% of 11343 decks
+28% synergy
Caltrops
25% of 11354 decks
+25% synergy
Isochron Scepter
14% of 11354 decks
+12% synergy
Wayfarer's Bauble
12% of 11354 decks
+2% synergy
Shadowspear
9% of 11249 decks
+6% synergy
Grafted Exoskeleton
9% of 11354 decks
+8% synergy
Mindsplice Apparatus
7% of 8961 decks
+5% synergy
Elixir of Immortality
7% of 11354 decks
+6% synergy
Wishclaw Talisman
7% of 405 decks
+2% synergy
Fist of Suns
7% of 128 decks
+0% synergy
Teferi's Puzzle Box
7% of 11354 decks
+6% synergy
Sensei's Divining Top
7% of 11354 decks
+1% synergy
Staff of Nin
7% of 11346 decks
+6% synergy
The One Ring
6% of 8416 decks
-3% synergy
Neurok Stealthsuit
6% of 11354 decks
+6% synergy
Gorgon Flail
6% of 11354 decks
+6% synergy
Thousand-Year Elixir
6% of 11354 decks
+4% synergy
Resurrection Orb
6% of 10233 decks
+5% synergy
Ruby Medallion
5% of 11354 decks
+2% synergy
Enchantments
Rhystic Study
38% of 11354 decks
+11% synergy
Smothering Tithe
38% of 671 decks
+13% synergy
Snake Umbra
37% of 307 decks
+34% synergy
Leyline of the Guildpact
31% of 39 decks
+8% synergy
Underworld Dreams
29% of 410 decks
+27% synergy
Circle of Flame
28% of 11350 decks
+28% synergy
Sigil of Sleep
28% of 11354 decks
+28% synergy
Impact Tremors
28% of 11339 decks
+18% synergy
Manabarbs
26% of 11354 decks
+24% synergy
Mystic Remora
22% of 11354 decks
+4% synergy
Spiteful Visions
20% of 410 decks
+17% synergy
Teferi's Ageless Insight
20% of 11209 decks
+15% synergy
Whirlwind of Thought
19% of 671 decks
+9% synergy
Quest for Renewal
19% of 307 decks
+17% synergy
Animate Dead
17% of 410 decks
+7% synergy
Waste Not
16% of 409 decks
+14% synergy
Fiery Inscription
16% of 7483 decks
+11% synergy
Propaganda
15% of 11354 decks
+3% synergy
Case of the Ransacked Lab
14% of 4361 decks
+12% synergy
Phyresis
14% of 410 decks
+13% synergy
Wizard Class
14% of 11066 decks
+9% synergy
Helm of the Ghastlord
14% of 410 decks
+13% synergy
Quicksilver Dagger
14% of 11354 decks
+13% synergy
Rhythm of the Wild
13% of 305 decks
-10% synergy
Burning Earth
13% of 11344 decks
+12% synergy
Megrim
13% of 410 decks
+12% synergy
Annie Joins Up
13% of 31 decks
-6% synergy
Dazzling Theater // Prop Room
12% of 40 decks
-7% synergy
Liliana's Caress
12% of 410 decks
+11% synergy
Roaring Furnace // Steaming Sauna
12% of 1079 decks
+3% synergy
Thousand-Year Storm
12% of 11319 decks
+7% synergy
Temur Ascendancy
11% of 307 decks
-3% synergy
Phyrexian Tyranny
11% of 410 decks
+9% synergy
Sylvan Library
10% of 307 decks
-1% synergy
Cast Out
10% of 671 decks
+10% synergy
Bloodchief Ascension
10% of 410 decks
+7% synergy
Jeskai Ascendancy
10% of 672 decks
+4% synergy
Bear Umbra
9% of 307 decks
+4% synergy
Ominous Seas
9% of 11233 decks
+6% synergy
Astral Drift
9% of 671 decks
+8% synergy
Roiling Vortex
8% of 11202 decks
+6% synergy
Market Festival
8% of 307 decks
+7% synergy
Ghostly Prison
8% of 674 decks
-4% synergy
Wild Growth
7% of 307 decks
-4% synergy
Mirari's Wake
7% of 138 decks
-7% synergy
Dawn's Reflection
7% of 307 decks
+7% synergy
Fertile Ground
7% of 307 decks
+3% synergy
Dance of the Dead
7% of 410 decks
+5% synergy
Phyrexian Arena
7% of 410 decks
-8% synergy
Astral Slide
7% of 674 decks
+6% synergy
Planeswalkers
Ral, Storm Conduit
29% of 11289 decks
+26% synergy
Ob Nixilis, the Hate-Twisted
16% of 407 decks
+15% synergy
Narset, Parter of Veils
14% of 11289 decks
+9% synergy
Ral, Crackling Wit
14% of 2356 decks
+6% synergy
Jace, Wielder of Mysteries
12% of 11289 decks
+8% synergy
Saheeli Rai
9% of 11330 decks
+8% synergy
Teferi, Temporal Pilgrim
9% of 9720 decks
+7% synergy
Chandra, Awakened Inferno
5% of 11275 decks
+4% synergy
Utility Lands
Reliquary Tower
63% of 11354 decks
+34% synergy
Secluded Steppe
34% of 674 decks
+31% synergy
Shivan Gorge
32% of 11354 decks
+31% synergy
Mystic Sanctuary
30% of 11271 decks
+17% synergy
Bojuka Bog
20% of 410 decks
-10% synergy
Drifting Meadow
17% of 674 decks
+16% synergy
Desert
14% of 11354 decks
+14% synergy
Otawara, Soaring City
13% of 10891 decks
-4% synergy
Desert of the True
13% of 671 decks
+11% synergy
Sunscorched Desert
12% of 11326 decks
+12% synergy
Forgotten Cave
12% of 11354 decks
+7% synergy
Lonely Sandbar
12% of 11354 decks
+8% synergy
Boseiju, Who Endures
11% of 274 decks
-8% synergy
Desolate Lighthouse
11% of 11346 decks
+7% synergy
Restless Spire
7% of 6400 decks
+4% synergy
Witch's Clinic
6% of 11150 decks
+5% synergy
Castle Vantress
6% of 11271 decks
+2% synergy
Temple of the False God
6% of 11354 decks
-4% synergy
Urza's Saga
6% of 11104 decks
-1% synergy
Arcane Lighthouse
6% of 11340 decks
+4% synergy
Takenuma, Abandoned Mire
6% of 379 decks
-5% synergy
Wandering Fumarole
5% of 11331 decks
+4% synergy
Eiganjo, Seat of the Empire
5% of 633 decks
-4% synergy
Mana Artifacts
Sol Ring
91% of 11354 decks
+6% synergy
Arcane Signet
88% of 11271 decks
+16% synergy
Izzet Signet
73% of 11354 decks
+45% synergy
Talisman of Creativity
51% of 11280 decks
+23% synergy
Azorius Signet
50% of 674 decks
+24% synergy
Boros Signet
45% of 674 decks
+21% synergy
Fellwar Stone
39% of 11354 decks
+18% synergy
Talisman of Conviction
37% of 671 decks
+14% synergy
Thought Vessel
36% of 11335 decks
+19% synergy
Talisman of Progress
32% of 674 decks
+9% synergy
Dimir Signet
29% of 410 decks
-0% synergy
Commander's Sphere
29% of 11340 decks
+14% synergy
Rakdos Signet
28% of 410 decks
-2% synergy
Talisman of Dominance
28% of 410 decks
-3% synergy
Talisman of Indulgence
24% of 410 decks
-2% synergy
Decanter of Endless Water
23% of 10680 decks
+18% synergy
Raugrin Crystal
23% of 671 decks
+21% synergy
Mind Stone
23% of 11354 decks
+6% synergy
Midnight Clock
20% of 11271 decks
+15% synergy
Simic Signet
14% of 307 decks
-0% synergy
Talisman of Curiosity
13% of 304 decks
+1% synergy
Gruul Signet
11% of 307 decks
-0% synergy
Izzet Locket
11% of 11319 decks
+10% synergy
Relic of Sauron
10% of 201 decks
-1% synergy
Timeless Lotus
10% of 110 decks
-4% synergy
Sky Diamond
9% of 11354 decks
+4% synergy
Talisman of Impulse
9% of 307 decks
+0% synergy
Fire Diamond
9% of 11354 decks
+3% synergy
Chromatic Lantern
8% of 11346 decks
-1% synergy
Izzet Cluestone
7% of 11345 decks
+7% synergy
Gilded Lotus
7% of 11354 decks
+4% synergy
Golgari Signet
7% of 150 decks
-6% synergy
Jeweled Lotus
6% of 11194 decks
+0% synergy
Mana Crypt
5% of 11354 decks
-3% synergy
Talisman of Resilience
5% of 150 decks
-6% synergy
Lotus Petal
5% of 11354 decks
-2% synergy
Lands
Command Tower
91% of 11350 decks
+17% synergy
Sulfur Falls
69% of 11346 decks
+38% synergy
Izzet Boilerworks
56% of 11354 decks
+39% synergy
Mystic Monastery
55% of 672 decks
+28% synergy
Temple of Epiphany
52% of 11342 decks
+34% synergy
Steam Vents
50% of 11354 decks
+11% synergy
Training Center
49% of 11194 decks
+21% synergy
Perilous Landscape
44% of 118 decks
+32% synergy
Watery Grave
44% of 410 decks
+3% synergy
Cascade Bluffs
43% of 11354 decks
+31% synergy
Shivan Reef
43% of 11354 decks
+16% synergy
Blood Crypt
43% of 410 decks
+4% synergy
Stormcarved Coast
43% of 10987 decks
+25% synergy
Stomping Ground
43% of 307 decks
+2% synergy
Frostboil Snarl
43% of 11150 decks
+29% synergy
Crumbling Necropolis
42% of 410 decks
+11% synergy
Raugrin Triome
42% of 671 decks
+15% synergy
Prairie Stream
42% of 672 decks
+8% synergy
Hallowed Fountain
41% of 674 decks
+0% synergy
Eroded Canyon
39% of 3675 decks
+36% synergy
Breeding Pool
39% of 307 decks
-2% synergy
Exotic Orchard
38% of 11354 decks
+3% synergy
Sacred Foundry
38% of 674 decks
+2% synergy
Xander's Lounge
37% of 375 decks
+10% synergy
Overgrown Tomb
37% of 150 decks
-6% synergy
Frontier Bivouac
36% of 307 decks
+9% synergy
Temple Garden
36% of 138 decks
-5% synergy
Ferrous Lake
35% of 3931 decks
+26% synergy
Ketria Triome
34% of 302 decks
+1% synergy
Irrigated Farmland
31% of 671 decks
+24% synergy
Riverglide Pathway
30% of 11202 decks
+21% synergy
Drowned Catacomb
29% of 410 decks
+3% synergy
Dragonskull Summit
29% of 410 decks
-2% synergy
Godless Shrine
28% of 138 decks
-12% synergy
Glacial Fortress
28% of 674 decks
+2% synergy
Sea of Clouds
27% of 671 decks
+1% synergy
Evolving Wilds
27% of 11354 decks
+6% synergy
Battlefield Forge
27% of 674 decks
+1% synergy
Yavimaya Coast
26% of 307 decks
-0% synergy
Scalding Tarn
26% of 11354 decks
+15% synergy
Swiftwater Cliffs
26% of 11340 decks
+19% synergy
Bountiful Landscape
25% of 55 decks
+10% synergy
Spectator Seating
25% of 666 decks
-0% synergy
Cinder Glade
25% of 306 decks
-14% synergy
Sunken Hollow
24% of 409 decks
-10% synergy
Simic Growth Chamber
24% of 307 decks
+5% synergy
Ziatora's Proving Ground
24% of 137 decks
-8% synergy
Seething Landscape
24% of 80 decks
+8% synergy
Spara's Headquarters
23% of 131 decks
-9% synergy
Zagoth Triome
23% of 150 decks
-8% synergy