Progenitor Mimic + Temporal Manipulation + Eternal Witness

Progenitor Mimic
Temporal Manipulation
Eternal Witness

Requires
Progenitor Mimic must be on the battlefield. Temporal Manipulation must be on the battlefield. Eternal Witness must be on the battlefield. Enough mana available to cast the extra turn spell each turn. Progenitor Mimic is a copy of Eternal Witness.
Steps
  1. Cast Temporal Manipulation by paying its mana cost, taking an extra turn after this one.
  2. At the beginning of your next upkeep, Progenitor Mimic triggers, creating a token copy of Eternal Witness.
  3. When the token Eternal Witness enters the battlefield, it triggers itself, returning Temporal Manipulation from your graveyard to your hand.
  4. Repeat.
Results
Infinite turns.

Riku of Two Reflections
0.37% of 4895 decks 18 decks
Maelstrom Wanderer
0.14% of 5785 decks 8 decks
Yarok, the Desecrated
0.04% of 10412 decks 4 decks
Rashmi and Ragavan
0.06% of 5146 decks 3 decks
Tatyova, Benthic Druid
0.05% of 5751 decks 3 decks
Roon of the Hidden Realm
0.09% of 3233 decks 3 decks
Galadriel, Light of Valinor
0.03% of 7839 decks 2 decks
Adrix and Nev, Twincasters
0.03% of 6612 decks 2 decks
Kenrith, the Returned King
0.01% of 21513 decks 2 decks
Volo, Guide to Monsters
0.03% of 7535 decks 2 decks
Tasigur, the Golden Fang
0.03% of 5816 decks 2 decks
Kinnan, Bonder Prodigy
0.02% of 12009 decks 2 decks
Kruphix, God of Horizons
0.06% of 3079 decks 2 decks
Chulane, Teller of Tales
0.03% of 7344 decks 2 decks
Derevi, Empyrial Tactician
0.03% of 7409 decks 2 decks
Momir Vig, Simic Visionary
0.10% of 1008 decks 1 decks
Intet, the Dreamer
0.12% of 859 decks 1 decks
Rashmi, Eternities Crafter
0.05% of 2003 decks 1 decks
High Synergy Cards
Time Warp
67% of 87 decks +64% synergy
Soulherder
60% of 15 decks +55% synergy
Teleportation Circle
53% of 15 decks +49% synergy
Karmic Guide
53% of 15 decks +49% synergy
Dockside Extortionist
57% of 37 decks +44% synergy
Brago, King Eternal
47% of 15 decks +43% synergy
Emiel the Blessed
47% of 15 decks +43% synergy
Deadeye Navigator
45% of 87 decks +43% synergy
Cloudblazer
40% of 15 decks +37% synergy
Elesh Norn, Mother of Machines
42% of 12 decks +37% synergy
Top Cards
Swords to Plowshares
67% of 15 decks +4% synergy
Cyclonic Rift
64% of 87 decks +36% synergy
Assassin's Trophy
54% of 13 decks +24% synergy
Birds of Paradise
52% of 87 decks +25% synergy
Counterspell
51% of 87 decks +8% synergy
Cultivate
51% of 87 decks +4% synergy
Farseek
48% of 87 decks +14% synergy
Noble Hierarch
47% of 15 decks +31% synergy
Nature's Lore
44% of 87 decks +12% synergy
Rhystic Study
43% of 87 decks +15% synergy
Creatures
Peregrine Drake
37% of 87 decks +33% synergy
Terror of the Peaks
35% of 37 decks +30% synergy
Etali, Primal Conqueror
33% of 21 decks +22% synergy
Kiki-Jiki, Mirror Breaker
32% of 37 decks +29% synergy
Archaeomancer
32% of 87 decks +28% synergy
Coiling Oracle
32% of 87 decks +24% synergy
Avenger of Zendikar
32% of 87 decks +23% synergy
Clever Impersonator
28% of 87 decks +25% synergy
Moonshaker Cavalry
27% of 11 decks +23% synergy
Spark Double
27% of 86 decks +20% synergy
Yorion, Sky Nomad
27% of 15 decks +24% synergy
Felidar Guardian
27% of 15 decks +24% synergy
Skyclave Apparition
27% of 15 decks +24% synergy
Mulldrifter
26% of 87 decks +21% synergy
Wood Elves
26% of 87 decks +19% synergy
Seedborn Muse
26% of 87 decks +18% synergy
Sakura-Tribe Elder
26% of 87 decks +8% synergy
Reclamation Sage
25% of 87 decks +14% synergy
Preston, the Vanisher
25% of 12 decks +24% synergy
Koma, Cosmos Serpent
24% of 78 decks +19% synergy
Biovisionary
24% of 87 decks +23% synergy
Phyrexian Metamorph
24% of 87 decks +17% synergy
Solemn Simulacrum
24% of 87 decks +10% synergy
Ravenous Chupacabra
23% of 13 decks +19% synergy
Notion Thief
23% of 13 decks +16% synergy
Deathrite Shaman
23% of 13 decks +11% synergy
Acidic Slime
23% of 87 decks +19% synergy
Thassa, Deep-Dwelling
22% of 85 decks +19% synergy
Palinchron
22% of 87 decks +21% synergy
Consecrated Sphinx
22% of 87 decks +17% synergy
Llanowar Elves
22% of 87 decks +1% synergy
Loran of the Third Path
21% of 14 decks +14% synergy
Sakashima of a Thousand Faces
21% of 82 decks +18% synergy
Mistmeadow Witch
20% of 15 decks +19% synergy
Eldrazi Displacer
20% of 15 decks +18% synergy
Charming Prince
20% of 15 decks +18% synergy
Restoration Angel
20% of 15 decks +17% synergy
Wall of Omens
20% of 15 decks +17% synergy
Nyxbloom Ancient
20% of 85 decks +16% synergy
Esper Sentinel
20% of 15 decks -1% synergy
Brudiclad, Telchor Engineer
19% of 37 decks +15% synergy
Dualcaster Mage
19% of 37 decks +14% synergy
Ancient Copper Dragon
19% of 27 decks +14% synergy
Displacer Kitten
18% of 65 decks +13% synergy
Adrix and Nev, Twincasters
18% of 78 decks +13% synergy
Agent of Treachery
17% of 86 decks +15% synergy
Temur Sabertooth
17% of 87 decks +13% synergy
Bloom Tender
17% of 87 decks +9% synergy
Scute Swarm
17% of 82 decks +7% synergy
Tireless Provisioner
17% of 78 decks +5% synergy
Instants
Beast Within
41% of 87 decks +3% synergy
Eerie Interlude
40% of 15 decks +36% synergy
Ephemerate
40% of 15 decks +34% synergy
Enlightened Tutor
40% of 15 decks +22% synergy
Path to Exile
40% of 15 decks -5% synergy
Mystical Tutor
39% of 87 decks +24% synergy
Deadly Rollick
36% of 11 decks +26% synergy
Worldly Tutor
36% of 87 decks +21% synergy
Mana Drain
34% of 87 decks +19% synergy
Momentary Blink
33% of 15 decks +30% synergy
Fierce Guardianship
33% of 84 decks +15% synergy
Deflecting Swat
32% of 37 decks +16% synergy
Chaos Warp
32% of 37 decks +0% synergy
Vampiric Tutor
31% of 13 decks +12% synergy
Flame of Anor
29% of 17 decks +24% synergy
Lae'zel's Acrobatics
29% of 14 decks +27% synergy
Brainstorm
28% of 87 decks +6% synergy
Cloudshift
27% of 15 decks +24% synergy
Generous Gift
27% of 15 decks +1% synergy
Heroic Intervention
25% of 87 decks -4% synergy
Growth Spiral
24% of 86 decks +3% synergy
Nexus of Fate
23% of 87 decks +21% synergy
An Offer You Can't Refuse
22% of 67 decks +2% synergy
Ghostway
20% of 15 decks +19% synergy
Eladamri's Call
20% of 15 decks +9% synergy
Dovin's Veto
20% of 15 decks +1% synergy
Teferi's Protection
20% of 15 decks -0% synergy
Arcane Denial
20% of 87 decks -0% synergy
Negate
20% of 87 decks -3% synergy
Chord of Calling
18% of 87 decks +13% synergy
Krosan Grip
18% of 87 decks +11% synergy
Swan Song
17% of 87 decks +1% synergy
Rapid Hybridization
16% of 87 decks +7% synergy
Reality Shift
15% of 87 decks +6% synergy
Nature's Claim
14% of 87 decks +4% synergy
Force of Will
14% of 87 decks +3% synergy
Ghostly Flicker
13% of 87 decks +8% synergy
Force of Negation
12% of 86 decks +2% synergy
Double Major
12% of 78 decks +8% synergy
Pongify
11% of 87 decks -0% synergy
Narset's Reversal
10% of 86 decks +7% synergy
Entish Restoration
10% of 40 decks +2% synergy
Dig Through Time
9% of 87 decks +4% synergy
Fact or Fiction
9% of 87 decks +2% synergy
Crop Rotation
9% of 87 decks -1% synergy
Resculpt
9% of 78 decks +4% synergy
Manamorphose
8% of 37 decks +6% synergy
Blue Sun's Zenith
8% of 87 decks +5% synergy
Pact of Negation
8% of 87 decks +1% synergy
Harrow
8% of 87 decks -2% synergy
Sorceries
Demonic Tutor
46% of 13 decks +24% synergy
Three Visits
41% of 87 decks +17% synergy
Kodama's Reach
41% of 87 decks +10% synergy
Rite of Replication
38% of 87 decks +35% synergy
Blasphemous Act
38% of 37 decks +4% synergy
Supreme Verdict
33% of 15 decks +19% synergy
Rampant Growth
33% of 87 decks -1% synergy
Diabolic Tutor
31% of 13 decks +24% synergy
Jeska's Will
31% of 36 decks +13% synergy
Hit the Mother Lode
27% of 11 decks +25% synergy
Wargate
27% of 15 decks +23% synergy
Finale of Devastation
26% of 86 decks +17% synergy
Genesis Ultimatum
24% of 37 decks +18% synergy
Dark Petition
23% of 13 decks +22% synergy
Mythos of Illuna
22% of 37 decks +20% synergy
Walk the Aeons
21% of 87 decks +20% synergy
Tooth and Nail
18% of 87 decks +17% synergy
Capture of Jingzhou
17% of 87 decks +17% synergy
Time Stretch
16% of 87 decks +15% synergy
Green Sun's Zenith
16% of 87 decks +10% synergy
Ponder
16% of 87 decks +3% synergy
Seasons Past
15% of 87 decks +14% synergy
Skyshroud Claim
15% of 87 decks +6% synergy
Expropriate
14% of 87 decks +12% synergy
Vandalblast
14% of 37 decks -3% synergy
Croaking Counterpart
12% of 77 decks +10% synergy
Regrowth
11% of 87 decks +8% synergy
Rishkar's Expertise
11% of 87 decks +1% synergy
Bala Ged Recovery
11% of 82 decks +2% synergy
Part the Waterveil
10% of 87 decks +10% synergy
Temporal Mastery
10% of 87 decks +9% synergy
Solve the Equation
10% of 78 decks +6% synergy
Eldritch Evolution
9% of 87 decks +4% synergy
Windfall
9% of 87 decks -4% synergy
Neoform
8% of 86 decks +3% synergy
Stitch in Time
8% of 37 decks +7% synergy
Escape to the Wilds
8% of 37 decks +4% synergy
Hull Breach
8% of 37 decks +3% synergy
Chain Reaction
8% of 37 decks +3% synergy
Mana Geyser
8% of 37 decks +1% synergy
Decimate
8% of 37 decks -0% synergy
Karn's Temporal Sundering
8% of 87 decks +7% synergy
Harmonize
8% of 87 decks -1% synergy
Preordain
8% of 87 decks -3% synergy
Sea Gate Restoration
7% of 82 decks +2% synergy
Open the Way
7% of 43 decks +5% synergy
Quasiduplicate
7% of 87 decks +6% synergy
Ezuri's Predation
7% of 87 decks +4% synergy
Explosive Vegetation
7% of 87 decks +4% synergy
Treasure Cruise
7% of 87 decks +2% synergy
Utility Artifacts
Panharmonicon
25% of 87 decks +21% synergy
Conjurer's Closet
22% of 87 decks +20% synergy
Lightning Greaves
17% of 87 decks -8% synergy
The One Ring
17% of 48 decks +8% synergy
Crystal Shard
16% of 87 decks +15% synergy
Sensei's Divining Top
15% of 87 decks +9% synergy
Twinning Staff
12% of 84 decks +11% synergy
The Great Henge
12% of 86 decks +2% synergy
Birthing Pod
11% of 87 decks +9% synergy
Swiftfoot Boots
10% of 87 decks -18% synergy
Lithoform Engine
9% of 82 decks +7% synergy
Isochron Scepter
7% of 87 decks +4% synergy
Bootleggers' Stash
6% of 67 decks +4% synergy
Scroll Rack
6% of 87 decks +4% synergy
Helm of the Host
6% of 87 decks +2% synergy
Strionic Resonator
6% of 87 decks +2% synergy
Mirror Box
5% of 74 decks +4% synergy
Enchantments
Sylvan Library
28% of 87 decks +16% synergy
Mirari's Wake
27% of 15 decks +13% synergy
Up the Beanstalk
20% of 35 decks +15% synergy
Aura Shards
20% of 15 decks +11% synergy
Mystic Remora
20% of 87 decks +2% synergy
Temur Ascendancy
16% of 37 decks +1% synergy
Parallel Lives
14% of 87 decks +7% synergy
Exploration
13% of 87 decks +4% synergy
Zendikar Resurgent
11% of 87 decks +9% synergy
Rhythm of the Wild
11% of 37 decks -13% synergy
Defense of the Heart
10% of 87 decks +8% synergy
Wild Growth
10% of 87 decks -1% synergy
Guardian Project
9% of 86 decks +1% synergy
Mana Reflection
9% of 87 decks +7% synergy
Leyline of Anticipation
9% of 87 decks +5% synergy
Wilderness Reclamation
8% of 86 decks +4% synergy
Goblin Bombardment
8% of 37 decks +2% synergy
Storm of Saruman
7% of 41 decks +6% synergy
Omniscience
7% of 87 decks +4% synergy
Utopia Sprawl
7% of 87 decks -1% synergy
Doubling Season
7% of 87 decks -2% synergy
Extravagant Replication
6% of 67 decks +5% synergy
Freed from the Real
6% of 87 decks +4% synergy
Burgeoning
6% of 87 decks +2% synergy
Planeswalkers
Aminatou, the Fateshifter
100% of 3 decks +97% synergy
Oko, Thief of Crowns
19% of 86 decks +13% synergy
Garruk, Primal Hunter
8% of 87 decks +5% synergy
Jace, the Mind Sculptor
7% of 87 decks +6% synergy
Utility Lands
Reliquary Tower
48% of 87 decks +19% synergy
Boseiju, Who Endures
32% of 74 decks +13% synergy
Yavimaya, Cradle of Growth
29% of 78 decks +20% synergy
Alchemist's Refuge
24% of 87 decks +17% synergy
Otawara, Soaring City
22% of 74 decks +5% synergy
Mystic Sanctuary
21% of 86 decks +9% synergy
Ancient Tomb
21% of 87 decks +10% synergy
Kessig Wolf Run
19% of 37 decks +3% synergy
Gaea's Cradle
17% of 87 decks +12% synergy
Temple of the False God
17% of 87 decks +8% synergy
Strip Mine
9% of 87 decks +6% synergy
Urza's Saga
9% of 78 decks +2% synergy
Field of the Dead
8% of 86 decks +5% synergy
Great Furnace
8% of 37 decks +2% synergy
Urborg, Tomb of Yawgmoth
8% of 87 decks -2% synergy
Lotus Field
7% of 86 decks +6% synergy
Boseiju, Who Shelters All
7% of 87 decks +6% synergy
Nykthos, Shrine to Nyx
7% of 87 decks +1% synergy
Mosswort Bridge
7% of 87 decks -4% synergy
Rogue's Passage
7% of 87 decks -12% synergy
Maze of Ith
6% of 87 decks +3% synergy
Mana Artifacts
Sol Ring
93% of 87 decks +9% synergy
Arcane Signet
67% of 86 decks -5% synergy
Azorius Signet
60% of 15 decks +34% synergy
Selesnya Signet
40% of 15 decks +31% synergy
Simic Signet
38% of 87 decks +23% synergy
Golgari Signet
31% of 13 decks +18% synergy
Dimir Signet
23% of 13 decks -7% synergy
Mana Crypt
23% of 87 decks +14% synergy
Talisman of Curiosity
22% of 86 decks +10% synergy
Chromatic Lantern
20% of 87 decks +10% synergy
Izzet Signet
16% of 37 decks -12% synergy
Fellwar Stone
16% of 87 decks -5% synergy
Gilded Lotus
15% of 87 decks +12% synergy
Gruul Signet
14% of 37 decks +1% synergy
Thought Vessel
13% of 87 decks -4% synergy
Talisman of Impulse
11% of 37 decks +2% synergy
Talisman of Creativity
11% of 37 decks -18% synergy
Thran Dynamo
9% of 87 decks +4% synergy
Mana Vault
9% of 87 decks +3% synergy
Commander's Sphere
8% of 87 decks -7% synergy
Mind Stone
8% of 87 decks -9% synergy
Basalt Monolith
7% of 87 decks +4% synergy
Mox Diamond
7% of 87 decks +2% synergy
Chrome Mox
7% of 87 decks +0% synergy
Jeweled Lotus
6% of 82 decks -0% synergy
Grim Monolith
6% of 87 decks +4% synergy
Mox Amber
6% of 87 decks +2% synergy
Lands
Command Tower
91% of 87 decks +17% synergy
Stomping Ground
86% of 37 decks +45% synergy
Steam Vents
84% of 37 decks +45% synergy
Hallowed Fountain
80% of 15 decks +39% synergy
Temple Garden
73% of 15 decks +33% synergy
Breeding Pool
69% of 87 decks +28% synergy
Bountiful Promenade
67% of 15 decks +42% synergy
Sea of Clouds
67% of 15 decks +41% synergy
Ketria Triome
62% of 37 decks +30% synergy
Sunpetal Grove
60% of 15 decks +37% synergy
Spara's Headquarters
60% of 15 decks +28% synergy
Misty Rainforest
57% of 87 decks +46% synergy
Watery Grave
54% of 13 decks +13% synergy
Overgrown Tomb
54% of 13 decks +11% synergy
Glacial Fortress
53% of 15 decks +28% synergy
Rejuvenating Springs
50% of 82 decks +21% synergy
Hinterland Harbor
48% of 87 decks +21% synergy
Training Center
42% of 36 decks +14% synergy
Yavimaya Coast
40% of 87 decks +14% synergy
Seaside Citadel
40% of 15 decks +14% synergy
Wooded Foothills
39% of 87 decks +29% synergy
Exotic Orchard
36% of 87 decks +0% synergy
Taiga
35% of 37 decks +22% synergy
Scalding Tarn
34% of 87 decks +23% synergy
Azorius Chancery
33% of 15 decks +19% synergy
Spire Garden
32% of 37 decks +8% synergy
Sulfur Falls
32% of 37 decks +2% synergy
Llanowar Wastes
31% of 13 decks +5% synergy
Opulent Palace
31% of 13 decks +4% synergy
Woodland Cemetery
31% of 13 decks +3% synergy
Sunken Hollow
31% of 13 decks -4% synergy
Volcanic Island
30% of 37 decks +16% synergy
Rootbound Crag
30% of 37 decks +6% synergy
Shivan Reef
30% of 37 decks +3% synergy
Frontier Bivouac
30% of 37 decks +2% synergy
Cinder Glade
30% of 37 decks -9% synergy
Simic Growth Chamber
28% of 87 decks +8% synergy
Karplusan Forest
27% of 37 decks +10% synergy
Deserted Beach
27% of 15 decks +11% synergy
Overgrown Farmland
27% of 15 decks +11% synergy
Prairie Stream
27% of 15 decks -7% synergy
Canopy Vista
27% of 15 decks -9% synergy
Flooded Strand
25% of 87 decks +15% synergy
Gruul Turf
24% of 37 decks +8% synergy
Izzet Boilerworks
24% of 37 decks +8% synergy
Windswept Heath
24% of 87 decks +14% synergy
Flooded Grove
24% of 87 decks +12% synergy
Tropical Island
24% of 87 decks +10% synergy
Dreamroot Cascade
24% of 75 decks +5% synergy
Dimir Aqueduct
23% of 13 decks +6% synergy