Frenetic Efreet + Chance Encounter
Frenetic Efreet
Chance Encounter
Requires
Frenetic Efreet must be on the battlefield.
Chance Encounter must be on the battlefield.
Steps
- Activate Frenetic Efreet's ability an arbitrarily large amount of times by paying a total of .
- Resolve the first Frenetic Efreet ability, flipping a coin and either sacrificing Frenetic Efreet or causing it to phase out.
- If you win the flip, Chance Encounter triggers, putting a luck counter on it.
- Resolve the next Frenetic Efreet ability, flipping a coin and not phasing out or sacrificing Frenetic Efreet due to it no longer being on the battlefield.
- Repeat from step 3.
Results
Win the game at the beginning of your next upkeep.
Okaun, Eye of Chaos // Zndrsplt, Eye of Wisdom
41.27% of 6404 decks
2643 decks
Yusri, Fortune's Flame
20.95% of 2697 decks
565 decks
Krark, the Thumbless // Sakashima of a Thousand Faces
1.27% of 4659 decks
59 decks
Kenrith, the Returned King
0.06% of 22115 decks
13 decks
Krark, the Thumbless // Thrasios, Triton Hero
1.32% of 681 decks
9 decks
Esior, Wardwing Familiar // Krark, the Thumbless
9.21% of 76 decks
7 decks
Ruhan of the Fomori
0.27% of 2248 decks
6 decks
Krark, the Thumbless // Silas Renn, Seeker Adept
1.32% of 380 decks
5 decks
Ramos, Dragon Engine
0.06% of 8743 decks
5 decks
Ian Malcolm, Chaotician
0.15% of 2607 decks
4 decks
Niv-Mizzet, Parun
0.03% of 14843 decks
4 decks
Reaper King
0.05% of 5541 decks
3 decks
Ral, Monsoon Mage
0.22% of 1357 decks
3 decks
Breeches, the Blastmaker
0.49% of 613 decks
3 decks
Golos, Tireless Pilgrim
0.39% of 775 decks
3 decks
Wyll, Blade of Frontiers // Sword Coast Sailor
0.12% of 2461 decks
3 decks
Garth One-Eye
0.07% of 4150 decks
3 decks
Jodah, Archmage Eternal
0.04% of 7994 decks
3 decks
New Cards
Roaring Furnace // Steaming Sauna
42% of 170 decks
+34% synergy
Enter the Enigma
38% of 217 decks
+31% synergy
Untimely Malfunction
22% of 256 decks
+7% synergy
Glimmerburst
10% of 127 decks
+7% synergy
Peculiar Lighthouse
10% of 262 decks
+8% synergy
High Synergy Cards
Krark's Thumb
97% of 3413 decks
+97% synergy
Tavern Scoundrel
96% of 3342 decks
+95% synergy
Stitch in Time
94% of 3412 decks
+92% synergy
Fiery Gambit
89% of 3413 decks
+89% synergy
Invert Polarity
89% of 1258 decks
+83% synergy
Squee's Revenge
83% of 3413 decks
+83% synergy
Krark, the Thumbless
80% of 3365 decks
+79% synergy
Planar Chaos
78% of 3414 decks
+77% synergy
Mayael's Aria
79% of 47 decks
+76% synergy
Yusri, Fortune's Flame
76% of 3341 decks
+75% synergy
Top Cards
Tribute Mage
76% of 3385 decks
+74% synergy
Karplusan Minotaur
75% of 3413 decks
+74% synergy
Chaos Warp
71% of 3413 decks
+40% synergy
Fabricate
71% of 3412 decks
+65% synergy
Counterspell
69% of 3413 decks
+27% synergy
Goblin Archaeologist
68% of 3413 decks
+68% synergy
Swiftfoot Boots
66% of 3413 decks
+38% synergy
Game of Chaos
66% of 3414 decks
+65% synergy
Felidar Sovereign
65% of 62 decks
+62% synergy
Gamble
64% of 3414 decks
+54% synergy
Creatures
Mutalith Vortex Beast
64% of 2852 decks
+63% synergy
Mogg Assassin
62% of 3414 decks
+62% synergy
Azor's Elocutors
61% of 61 decks
+60% synergy
Biovisionary
59% of 61 decks
+58% synergy
Goblin Traprunner
58% of 3342 decks
+58% synergy
Spark Double
55% of 3387 decks
+48% synergy
Homunculus Horde
54% of 94 decks
+48% synergy
Twenty-Toed Toad
53% of 424 decks
+48% synergy
Goblin Engineer
50% of 3386 decks
+47% synergy
Goblin Kaboomist
47% of 3409 decks
+46% synergy
Niv-Mizzet, Parun
45% of 3391 decks
+37% synergy
Loyal Inventor
43% of 596 decks
+41% synergy
Kediss, Emberclaw Familiar
41% of 3365 decks
+38% synergy
Creepy Doll
39% of 3413 decks
+39% synergy
The Locust God
36% of 3400 decks
+31% synergy
Birds of Paradise
32% of 62 decks
+5% synergy
Breeches, the Blastmaker
31% of 1396 decks
+30% synergy
Niv-Mizzet, Visionary
31% of 118 decks
+21% synergy
Ramses, Assassin Lord
28% of 57 decks
+27% synergy
Sakashima the Impostor
27% of 3412 decks
+25% synergy
Frenetic Sliver
27% of 3412 decks
+26% synergy
Clinquant Skymage
26% of 50 decks
+23% synergy
Chaotic Goo
26% of 3414 decks
+26% synergy
Nine-Fingers Keene
25% of 36 decks
+23% synergy
Ral, Monsoon Mage
24% of 1292 decks
+21% synergy
Two-Headed Giant
23% of 3399 decks
+23% synergy
Rakdos, the Showstopper
22% of 67 decks
+21% synergy
Sakashima of a Thousand Faces
21% of 3364 decks
+18% synergy
Triskaidekaphile
21% of 3135 decks
+19% synergy
Eternal Witness
19% of 62 decks
-1% synergy
Zndrsplt, Eye of Wisdom
19% of 3396 decks
+19% synergy
Sage of the Maze
19% of 16 decks
+17% synergy
Laboratory Maniac
18% of 3412 decks
+14% synergy
Okaun, Eye of Chaos
18% of 3397 decks
+18% synergy
Atraxa, Praetors' Voice
17% of 41 decks
+13% synergy
Goblin Assassin
17% of 3414 decks
+16% synergy
Pinnacle Monk
17% of 757 decks
+10% synergy
Vorel of the Hull Clade
16% of 61 decks
+14% synergy
Bringer of the Black Dawn
16% of 45 decks
+14% synergy
Bloodsworn Steward
15% of 3401 decks
+15% synergy
Imperial Recruiter
15% of 3414 decks
+9% synergy
Goblin Bangchuckers
15% of 3413 decks
+15% synergy
Roaming Throne
15% of 1701 decks
+5% synergy
Phage the Untouchable
15% of 74 decks
+15% synergy
Hermit Druid
15% of 62 decks
+13% synergy
Skyclaw Thrash
15% of 3412 decks
+14% synergy
Psychosis Crawler
14% of 3413 decks
+11% synergy
Nightscape Familiar
14% of 74 decks
+11% synergy
Crazed Firecat
13% of 3414 decks
+13% synergy
Volatile Rig
13% of 3412 decks
+13% synergy
Instants
Muddle the Mixture
63% of 3412 decks
+58% synergy
Negate
42% of 3412 decks
+20% synergy
Desperate Gambit
41% of 3414 decks
+41% synergy
Temur Battle Rage
39% of 3409 decks
+37% synergy
Whir of Invention
35% of 3400 decks
+32% synergy
Cyclonic Rift
35% of 3411 decks
+7% synergy
Fling
35% of 3414 decks
+33% synergy
Soul's Fire
34% of 3413 decks
+33% synergy
Puppet's Verdict
34% of 3414 decks
+33% synergy
Fighting Chance
31% of 3414 decks
+31% synergy
An Offer You Can't Refuse
28% of 3043 decks
+7% synergy
Brainstorm
26% of 3413 decks
+5% synergy
Vampiric Tutor
26% of 74 decks
+8% synergy
Bulk Up
25% of 28 decks
+14% synergy
Growth Spiral
25% of 56 decks
+3% synergy
Swords to Plowshares
24% of 62 decks
-39% synergy
Kazuul's Fury
23% of 3366 decks
+21% synergy
Demonic Consultation
22% of 74 decks
+18% synergy
Mystical Tutor
22% of 3413 decks
+7% synergy
Fierce Guardianship
21% of 3372 decks
+3% synergy
Mana Drain
19% of 3413 decks
+4% synergy
Deflecting Swat
19% of 3373 decks
+2% synergy
Odds // Ends
18% of 62 decks
+18% synergy
Arcane Denial
17% of 3413 decks
-2% synergy
Pongify
17% of 3412 decks
+6% synergy
Shadow Rift
17% of 3413 decks
+16% synergy
Beacon of Immortality
16% of 62 decks
+15% synergy
Manamorphose
16% of 62 decks
+13% synergy
Enlightened Tutor
16% of 62 decks
-1% synergy
Path to Exile
16% of 62 decks
-30% synergy
Swan Song
16% of 3411 decks
-1% synergy
Long-Term Plans
15% of 3413 decks
+14% synergy
Chaotic Strike
15% of 3414 decks
+15% synergy
Siege Smash
13% of 694 decks
+10% synergy
Tainted Pact
12% of 74 decks
+8% synergy
Dark Ritual
12% of 74 decks
-10% synergy
Teferi's Protection
12% of 58 decks
-8% synergy
Frantic Search
12% of 3413 decks
-0% synergy
Noxious Revival
11% of 62 decks
+6% synergy
Crop Rotation
11% of 62 decks
+1% synergy
Double Major
11% of 55 decks
+7% synergy
Rapid Hybridization
11% of 3411 decks
+2% synergy
Aleatory
11% of 3414 decks
+11% synergy
Force of Will
11% of 3413 decks
-0% synergy
Contraband Livestock
10% of 49 decks
+9% synergy
Kaervek's Spite
9% of 74 decks
+9% synergy
Wild Magic Surge
9% of 2996 decks
+7% synergy
Izzet Charm
9% of 3411 decks
+4% synergy
Reality Shift
9% of 3408 decks
+0% synergy
Guff Rewrites History
9% of 1981 decks
+8% synergy
Sorceries
Approach of the Second Sun
64% of 58 decks
+60% synergy
Chandra's Ignition
63% of 3409 decks
+59% synergy
Blasphemous Act
62% of 3413 decks
+28% synergy
Boltwave
54% of 28 decks
+36% synergy
Seize the Day
43% of 3414 decks
+41% synergy
Slip Through Space
43% of 3408 decks
+41% synergy
Circuitous Route
40% of 57 decks
+38% synergy
Vandalblast
40% of 3412 decks
+24% synergy
Ponder
37% of 3412 decks
+24% synergy
Molten Birth
36% of 3412 decks
+36% synergy
Mana Clash
34% of 3414 decks
+34% synergy
Demonic Tutor
34% of 74 decks
+12% synergy
Farseek
29% of 62 decks
-5% synergy
Reckless Handling
29% of 2271 decks
+27% synergy
Preordain
24% of 3412 decks
+13% synergy
Jeska's Will
22% of 3365 decks
+4% synergy
Explore the Underdark
22% of 51 decks
+21% synergy
Sylvan Scrying
21% of 62 decks
+18% synergy
Reshape
20% of 3412 decks
+18% synergy
Irenicus's Vile Duplication
19% of 2995 decks
+16% synergy
Reshape the Earth
16% of 55 decks
+15% synergy
Kodama's Reach
16% of 62 decks
-15% synergy
Nature's Lore
16% of 62 decks
-16% synergy
Open the Gates
16% of 56 decks
+15% synergy
Thud
15% of 3396 decks
+15% synergy
Merciless Eviction
15% of 47 decks
+10% synergy
Explore
15% of 62 decks
+5% synergy
Cultivate
15% of 62 decks
-31% synergy
Winter Sky
14% of 3414 decks
+14% synergy
Tempt with Discovery
14% of 58 decks
+10% synergy
Serum Visions
13% of 3412 decks
+9% synergy
Relentless Assault
13% of 3414 decks
+10% synergy
Doppelgang
12% of 24 decks
+9% synergy
Idyllic Tutor
11% of 62 decks
+6% synergy
Three Visits
11% of 62 decks
-13% synergy
Windfall
11% of 3413 decks
-2% synergy
Body of Research
11% of 55 decks
+10% synergy
Grim Tutor
11% of 74 decks
+6% synergy
Gravitic Punch
10% of 3392 decks
+10% synergy
Artful Dodge
10% of 3411 decks
+9% synergy
Wrath of God
10% of 62 decks
+3% synergy
Diabolic Tutor
9% of 74 decks
+3% synergy
Open the Way
9% of 34 decks
+6% synergy
Toxic Deluge
9% of 69 decks
-9% synergy
Fractured Identity
9% of 58 decks
+7% synergy
Faithless Looting
8% of 3412 decks
-8% synergy
Damnation
8% of 73 decks
+0% synergy
Rampant Growth
8% of 62 decks
-27% synergy
Wheel of Misfortune
8% of 3365 decks
+4% synergy
Dance with Calamity
8% of 2294 decks
+7% synergy
Utility Artifacts
Lightning Greaves
62% of 3413 decks
+37% synergy
Boompile
54% of 3408 decks
+54% synergy
Door to Nothingness
49% of 45 decks
+45% synergy
Halo Fountain
48% of 50 decks
+45% synergy
Whispersilk Cloak
46% of 3413 decks
+42% synergy
Shadowspear
36% of 3375 decks
+33% synergy
Crooked Scales
31% of 3414 decks
+31% synergy
Brotherhood Regalia
30% of 674 decks
+26% synergy
Leyline Axe
30% of 50 decks
+24% synergy
Commander's Plate
22% of 3365 decks
+20% synergy
Strionic Resonator
20% of 3412 decks
+17% synergy
Sorcerer's Strongbox
17% of 3413 decks
+17% synergy
Plasma Caster
17% of 1469 decks
+16% synergy
Embercleave
15% of 3380 decks
+12% synergy
Sword of Vengeance
14% of 3413 decks
+13% synergy
Legacy Weapon
13% of 45 decks
+12% synergy
Mithril Coat
13% of 2072 decks
+7% synergy
Bootleggers' Stash
11% of 53 decks
+9% synergy
Obelisk of Alara
11% of 45 decks
+11% synergy
Basilisk Collar
10% of 3413 decks
+6% synergy
Norn's Annex
10% of 62 decks
+8% synergy
Wayfarer's Bauble
9% of 3413 decks
-1% synergy
Wirefly Hive
9% of 3413 decks
+9% synergy
Helm of the Host
8% of 3399 decks
+5% synergy
Loxodon Warhammer
8% of 3413 decks
+6% synergy
Bolas's Citadel
7% of 67 decks
-2% synergy
Vorpal Sword
6% of 64 decks
+5% synergy
The One Ring
5% of 2325 decks
-3% synergy
Trailblazer's Boots
5% of 3413 decks
+4% synergy
Spellbook
5% of 3414 decks
+4% synergy
Enchantments
Mirror March
62% of 3390 decks
+61% synergy
Helix Pinnacle
58% of 62 decks
+57% synergy
Impulsive Maneuvers
57% of 3414 decks
+57% synergy
Simic Ascendancy
57% of 56 decks
+52% synergy
Near-Death Experience
52% of 62 decks
+52% synergy
Happily Ever After
51% of 55 decks
+51% synergy
Revel in Riches
50% of 68 decks
+47% synergy
Test of Endurance
47% of 62 decks
+46% synergy
Epic Struggle
45% of 62 decks
+45% synergy
Barren Glory
40% of 62 decks
+40% synergy
Propaganda
38% of 3413 decks
+26% synergy
Footfall Crater
37% of 3373 decks
+36% synergy
Goblin Bomb
36% of 3414 decks
+36% synergy
Mortal Combat
35% of 74 decks
+35% synergy
Liliana's Contract
34% of 68 decks
+33% synergy
Gallifrey Stands
32% of 28 decks
+31% synergy
Smothering Tithe
29% of 56 decks
+4% synergy
Rhystic Study
27% of 3413 decks
-0% synergy
Celestial Convergence
26% of 62 decks
+26% synergy
Rite of the Dragoncaller
25% of 28 decks
+12% synergy
Leyline of the Guildpact
25% of 16 decks
+2% synergy
Wizard Class
25% of 3151 decks
+21% synergy
Risky Move
24% of 3414 decks
+24% synergy
Tide of War
23% of 3413 decks
+23% synergy
Mystic Remora
19% of 3413 decks
+1% synergy
Spelunking
18% of 28 decks
+13% synergy
Ghostly Prison
18% of 62 decks
+6% synergy
Oblivion Ring
16% of 62 decks
+15% synergy
Doubling Season
16% of 62 decks
+7% synergy
Colossification
15% of 55 decks
+13% synergy
Goblin Festival
14% of 3414 decks
+14% synergy
Phyrexian Arena
14% of 74 decks
-2% synergy
The Apprentice's Folly
13% of 1936 decks
+12% synergy
Worship
11% of 62 decks
+11% synergy
Wilderness Reclamation
11% of 56 decks
+7% synergy
Triskaidekaphobia
10% of 69 decks
+10% synergy
Spirit of Resistance
10% of 62 decks
+10% synergy
Prismatic Omen
10% of 62 decks
+9% synergy
Mana Reflection
10% of 62 decks
+8% synergy
Sylvan Library
10% of 62 decks
-2% synergy
Teferi's Ageless Insight
10% of 3369 decks
+5% synergy
Aqueous Form
10% of 3411 decks
+6% synergy
Necropotence
9% of 74 decks
+4% synergy
Powerbalance
9% of 1293 decks
+6% synergy
Aura Shards
9% of 47 decks
-0% synergy
Resourceful Defense
8% of 50 decks
+7% synergy
Rising of the Day
8% of 2132 decks
+2% synergy
Authority of the Consuls
7% of 58 decks
+2% synergy
Conspiracy
7% of 74 decks
+6% synergy
Proft's Eidetic Memory
6% of 1533 decks
+3% synergy
Planeswalkers
Ral Zarek
59% of 3411 decks
+58% synergy
Daretti, Scrap Savant
13% of 3409 decks
+11% synergy
Comet, Stellar Pup
10% of 42 decks
+8% synergy
Tezzeret the Seeker
9% of 3412 decks
+7% synergy
Vraska the Unseen
9% of 44 decks
+8% synergy
Nicol Bolas, Dragon-God
7% of 67 decks
+3% synergy
Jace, Wielder of Mysteries
7% of 3387 decks
+4% synergy
Ral, Crackling Wit
6% of 473 decks
-1% synergy
Gideon of the Trials
5% of 58 decks
+5% synergy
Utility Lands
Reliquary Tower
79% of 3413 decks
+50% synergy
Rogue's Passage
66% of 3412 decks
+47% synergy
Buried Ruin
56% of 3413 decks
+51% synergy
Academy Ruins
49% of 3412 decks
+44% synergy
Arena of Glory
35% of 845 decks
+26% synergy
Inventors' Fair
32% of 3408 decks
+29% synergy
The Black Gate
31% of 35 decks
+28% synergy
Tolaria West
23% of 3412 decks
+21% synergy
Great Furnace
23% of 3413 decks
+17% synergy
Otawara, Soaring City
20% of 3076 decks
+3% synergy
Desolate Lighthouse
19% of 3411 decks
+15% synergy
Flamekin Village
18% of 3409 decks
+17% synergy
Temple of the False God
16% of 3414 decks
+6% synergy
Spinerock Knoll
15% of 3413 decks
+10% synergy
Access Tunnel
15% of 3347 decks
+12% synergy
Wandering Fumarole
13% of 3408 decks
+12% synergy
Mystic Sanctuary
13% of 3379 decks
+1% synergy
Ancient Tomb
12% of 3414 decks
+2% synergy
Urza's Saga
10% of 3342 decks
+3% synergy
Eiganjo, Seat of the Empire
10% of 50 decks
+1% synergy
Bojuka Bog
10% of 73 decks
-21% synergy
Seat of the Synod
8% of 3412 decks
+2% synergy
Alchemist's Refuge
8% of 61 decks
+2% synergy
Restless Spire
8% of 1936 decks
+5% synergy
Witch's Clinic
7% of 3347 decks
+5% synergy
Takenuma, Abandoned Mire
6% of 63 decks
-4% synergy
Mana Artifacts
Sol Ring
92% of 3414 decks
+8% synergy
Arcane Signet
87% of 3380 decks
+15% synergy
Izzet Signet
75% of 3412 decks
+47% synergy
Thought Vessel
71% of 3409 decks
+54% synergy
Talisman of Creativity
67% of 3385 decks
+38% synergy
Mind Stone
40% of 3414 decks
+23% synergy
Decanter of Endless Water
25% of 2996 decks
+21% synergy
Fellwar Stone
25% of 3414 decks
+4% synergy
Mana Crypt
24% of 3414 decks
+17% synergy
Commander's Sphere
14% of 3409 decks
-1% synergy
Simic Signet
10% of 62 decks
-5% synergy
Boros Signet
10% of 62 decks
-14% synergy
Dimir Signet
10% of 73 decks
-20% synergy
Talisman of Conviction
9% of 55 decks
-14% synergy
Jeweled Lotus
8% of 3365 decks
+3% synergy
Talisman of Indulgence
8% of 73 decks
-18% synergy
Talisman of Dominance
8% of 73 decks
-23% synergy
Gruul Signet
8% of 62 decks
-4% synergy
Mana Vault
8% of 3414 decks
+1% synergy
Talisman of Curiosity
7% of 55 decks
-5% synergy
Chrome Mox
6% of 3413 decks
-0% synergy
Fire Diamond
5% of 3414 decks
+0% synergy
Sky Diamond
5% of 3413 decks
+0% synergy
Lands
Command Tower
90% of 3413 decks
+16% synergy
Golgari Guildgate
80% of 44 decks
+73% synergy
Selesnya Guildgate
78% of 46 decks
+74% synergy
Sulfur Falls
75% of 3412 decks
+44% synergy
Orzhov Guildgate
74% of 47 decks
+70% synergy
Shivan Reef
67% of 3413 decks
+40% synergy
Training Center
62% of 3364 decks
+34% synergy
Azorius Guildgate
61% of 61 decks
+56% synergy
Simic Guildgate
61% of 61 decks
+54% synergy
Gruul Guildgate
59% of 61 decks
+54% synergy
Boros Guildgate
59% of 61 decks
+54% synergy
Manor Gate
59% of 51 decks
+57% synergy
Cascade Bluffs
58% of 3412 decks
+45% synergy
Citadel Gate
57% of 49 decks
+55% synergy
Steam Vents
54% of 3412 decks
+15% synergy
Black Dragon Gate
53% of 59 decks
+51% synergy
Rakdos Guildgate
51% of 72 decks
+47% synergy
Dimir Guildgate
51% of 72 decks
+47% synergy
Izzet Boilerworks
51% of 3412 decks
+35% synergy
Temple of Epiphany
49% of 3408 decks
+31% synergy
Stormcarved Coast
43% of 3120 decks
+26% synergy
Blood Crypt
37% of 73 decks
-1% synergy
Exotic Orchard
37% of 3413 decks
+1% synergy
Myriad Landscape
35% of 3409 decks
+16% synergy
Hallowed Fountain
35% of 62 decks
-5% synergy
Riverglide Pathway
34% of 3365 decks
+25% synergy
Breeding Pool
34% of 62 decks
-7% synergy
Sacred Foundry
32% of 62 decks
-4% synergy
Watery Grave
32% of 73 decks
-9% synergy
Godless Shrine
31% of 48 decks
-9% synergy
Scalding Tarn
31% of 3413 decks
+20% synergy
Overgrown Tomb
31% of 45 decks
-11% synergy
Stomping Ground
29% of 62 decks
-12% synergy
Frostboil Snarl
29% of 3346 decks
+15% synergy
Temple Garden
28% of 47 decks
-12% synergy
Xander's Lounge
24% of 62 decks
-3% synergy
Ketria Triome
22% of 55 decks
-11% synergy
Fiery Islet
22% of 3385 decks
+14% synergy
Ferrous Lake
21% of 1492 decks
+12% synergy
Thundering Falls
21% of 1577 decks
+10% synergy
Dragonskull Summit
19% of 73 decks
-12% synergy
The World Tree
18% of 38 decks
-15% synergy
Raugrin Triome
18% of 55 decks
-8% synergy
Path of Ancestry
18% of 3401 decks
-4% synergy
Drowned Catacomb
16% of 73 decks
-9% synergy
Zagoth Triome
16% of 38 decks
-15% synergy
Indatha Triome
16% of 38 decks
-15% synergy
Mystic Monastery
16% of 58 decks
-11% synergy
Frontier Bivouac
16% of 58 decks
-12% synergy
Cinder Glade
16% of 58 decks
-23% synergy