Progenitor Mimic + Capture of Jingzhou + Eternal Witness

Progenitor Mimic
Capture of Jingzhou
Eternal Witness

Requires
Progenitor Mimic must be on the battlefield. Capture of Jingzhou 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 Capture of Jingzhou 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 Capture of Jingzhou from your graveyard to your hand.
  4. Repeat.
Results
Infinite turns.

Riku of Two Reflections
0.16% of 4895 decks 8 decks
Maelstrom Wanderer
0.09% of 5785 decks 5 decks
Adrix and Nev, Twincasters
0.06% of 6612 decks 4 decks
Rashmi, Eternities Crafter
0.10% of 2003 decks 2 decks
Felix Five-Boots
0.06% of 3292 decks 2 decks
Momir Vig, Simic Visionary
0.10% of 1008 decks 1 decks
Yidris, Maelstrom Wielder
0.02% of 6600 decks 1 decks
Kenrith, the Returned King
0.00% of 21513 decks 1 decks
Loot, the Key to Everything
0.03% of 3203 decks 1 decks
Damia, Sage of Stone
0.03% of 3022 decks 1 decks
Koma, Cosmos Serpent
0.02% of 5291 decks 1 decks
Esix, Fractal Bloom
0.03% of 3180 decks 1 decks
Animar, Soul of Elements
0.01% of 15877 decks 1 decks
Círdan the Shipwright
0.06% of 1728 decks 1 decks
Xyris, the Writhing Storm
0.01% of 10791 decks 1 decks
Muldrotha, the Gravetide
0.01% of 15112 decks 1 decks
Gandalf, Westward Voyager
0.13% of 776 decks 1 decks
Chulane, Teller of Tales
0.01% of 7344 decks 1 decks
High Synergy Cards
Time Warp
59% of 37 decks +57% synergy
Etali, Primal Conqueror
60% of 10 decks +48% synergy
Cyclonic Rift
70% of 37 decks +42% synergy
Temporal Manipulation
41% of 37 decks +39% synergy
Doppelgang
42% of 12 decks +38% synergy
Rite of Replication
41% of 37 decks +37% synergy
Mystical Tutor
51% of 37 decks +36% synergy
Dockside Extortionist
47% of 17 decks +34% synergy
Nexus of Fate
35% of 37 decks +33% synergy
Deadeye Navigator
35% of 37 decks +33% synergy
Top Cards
Rhystic Study
59% of 37 decks +32% synergy
Kodama's Reach
51% of 37 decks +20% synergy
Farseek
49% of 37 decks +14% synergy
Cultivate
49% of 37 decks +2% synergy
Birds of Paradise
46% of 37 decks +19% synergy
Nature's Lore
46% of 37 decks +14% synergy
Blasphemous Act
44% of 18 decks +11% synergy
Worldly Tutor
41% of 37 decks +26% synergy
Rampant Growth
38% of 37 decks +3% synergy
Beast Within
38% of 37 decks -1% synergy
Creatures
Sakura-Tribe Elder
35% of 37 decks +17% synergy
Delighted Halfling
32% of 25 decks +18% synergy
Koma, Cosmos Serpent
29% of 35 decks +23% synergy
Spark Double
28% of 36 decks +21% synergy
Etali, Primal Storm
28% of 18 decks +18% synergy
Biovisionary
27% of 37 decks +26% synergy
Avenger of Zendikar
27% of 37 decks +17% synergy
Harmonic Prodigy
27% of 15 decks +23% synergy
Sakashima of a Thousand Faces
25% of 36 decks +22% synergy
Nyxbloom Ancient
25% of 36 decks +21% synergy
Archaeomancer
24% of 37 decks +21% synergy
Consecrated Sphinx
24% of 37 decks +19% synergy
Llanowar Elves
24% of 37 decks +3% synergy
Hullbreaker Horror
24% of 34 decks +16% synergy
Kiki-Jiki, Mirror Breaker
22% of 18 decks +19% synergy
Craterhoof Behemoth
22% of 37 decks +16% synergy
Phyrexian Metamorph
22% of 37 decks +15% synergy
Solemn Simulacrum
22% of 37 decks +8% synergy
Ancient Copper Dragon
21% of 14 decks +17% synergy
Thassa, Deep-Dwelling
19% of 36 decks +16% synergy
Clever Impersonator
19% of 37 decks +16% synergy
Coiling Oracle
19% of 37 decks +11% synergy
Reclamation Sage
19% of 37 decks +8% synergy
Terror of the Peaks
18% of 17 decks +13% synergy
Inferno Titan
17% of 18 decks +15% synergy
Zealous Conscripts
17% of 18 decks +15% synergy
Agent of Treachery
17% of 36 decks +15% synergy
Dualcaster Mage
17% of 18 decks +12% synergy
Palinchron
16% of 37 decks +16% synergy
Mulldrifter
16% of 37 decks +10% synergy
Wood Elves
16% of 37 decks +9% synergy
Gruff Triplets
16% of 19 decks +14% synergy
Displacer Kitten
15% of 33 decks +10% synergy
Tireless Provisioner
15% of 34 decks +4% synergy
Thassa's Oracle
14% of 36 decks +7% synergy
Tendershoot Dryad
14% of 37 decks +11% synergy
Temur Sabertooth
14% of 37 decks +10% synergy
Acidic Slime
14% of 37 decks +9% synergy
Lotus Cobra
14% of 37 decks +6% synergy
Bloom Tender
14% of 37 decks +6% synergy
Seedborn Muse
14% of 37 decks +5% synergy
Tatyova, Benthic Druid
14% of 37 decks +2% synergy
Timeless Witness
12% of 34 decks +9% synergy
Old Gnawbone
12% of 34 decks +7% synergy
Esix, Fractal Bloom
11% of 35 decks +10% synergy
Curiosity Crafter
11% of 35 decks +10% synergy
Imoti, Celebrant of Bounty
11% of 36 decks +8% synergy
Scute Swarm
11% of 36 decks +1% synergy
Mnemonic Wall
11% of 37 decks +10% synergy
Pathbreaker Ibex
11% of 37 decks +10% synergy
Instants
Vampiric Tutor
43% of 7 decks +25% synergy
Assassin's Trophy
43% of 7 decks +13% synergy
Mana Drain
41% of 37 decks +25% synergy
Counterspell
38% of 37 decks -5% synergy
Fierce Guardianship
36% of 36 decks +18% synergy
Flame of Anor
33% of 9 decks +28% synergy
Chaos Warp
33% of 18 decks +1% synergy
Heroic Intervention
32% of 37 decks +3% synergy
Brainstorm
27% of 37 decks +6% synergy
Narset's Reversal
22% of 36 decks +18% synergy
Growth Spiral
22% of 36 decks +0% synergy
Force of Will
22% of 37 decks +10% synergy
Pact of Negation
19% of 37 decks +11% synergy
Pongify
19% of 37 decks +7% synergy
An Offer You Can't Refuse
18% of 33 decks -2% synergy
Deflecting Swat
18% of 17 decks +1% synergy
Chord of Calling
16% of 37 decks +10% synergy
Swan Song
16% of 37 decks -0% synergy
Elminster's Simulacrum
15% of 33 decks +15% synergy
Double Major
14% of 35 decks +11% synergy
Second Harvest
14% of 37 decks +9% synergy
Noxious Revival
14% of 37 decks +8% synergy
Flusterstorm
14% of 37 decks +7% synergy
Krosan Grip
14% of 37 decks +6% synergy
Reality Shift
14% of 37 decks +5% synergy
Rapid Hybridization
14% of 37 decks +4% synergy
Nature's Claim
14% of 37 decks +4% synergy
Frantic Search
14% of 37 decks +1% synergy
Arcane Denial
14% of 37 decks -6% synergy
See Double
12% of 26 decks +9% synergy
Dramatic Reversal
11% of 37 decks +5% synergy
Harrow
11% of 37 decks +1% synergy
Resculpt
9% of 35 decks +3% synergy
Force of Vigor
8% of 36 decks +5% synergy
Veil of Summer
8% of 36 decks +2% synergy
Force of Negation
8% of 36 decks -1% synergy
Commandeer
8% of 37 decks +7% synergy
Intuition
8% of 37 decks +6% synergy
Cryptic Command
8% of 37 decks +6% synergy
Blue Sun's Zenith
8% of 37 decks +5% synergy
Rewind
8% of 37 decks +5% synergy
Dig Through Time
8% of 37 decks +3% synergy
Crop Rotation
8% of 37 decks -2% synergy
Negate
8% of 37 decks -15% synergy
Sorceries
Villainous Wealth
43% of 7 decks +35% synergy
Demonic Tutor
43% of 7 decks +20% synergy
Three Visits
38% of 37 decks +13% synergy
Genesis Ultimatum
29% of 17 decks +24% synergy
Walk the Aeons
24% of 37 decks +23% synergy
Skyshroud Claim
22% of 37 decks +12% synergy
Tooth and Nail
19% of 37 decks +17% synergy
Mythos of Illuna
18% of 17 decks +16% synergy
Jeska's Will
18% of 17 decks +0% synergy
Part the Waterveil
16% of 37 decks +16% synergy
Karn's Temporal Sundering
16% of 37 decks +15% synergy
Finale of Devastation
14% of 36 decks +6% synergy
Bala Ged Recovery
14% of 36 decks +5% synergy
Seasons Past
14% of 37 decks +13% synergy
Temporal Mastery
14% of 37 decks +12% synergy
Regrowth
14% of 37 decks +10% synergy
Eldritch Evolution
14% of 37 decks +9% synergy
Ponder
14% of 37 decks +1% synergy
Irenicus's Vile Duplication
12% of 33 decks +9% synergy
Sea Gate Restoration
11% of 36 decks +6% synergy
Beacon of Tomorrows
11% of 37 decks +10% synergy
Time Stretch
11% of 37 decks +9% synergy
Expropriate
11% of 37 decks +9% synergy
Green Sun's Zenith
11% of 37 decks +5% synergy
Harmonize
11% of 37 decks +2% synergy
Explore
11% of 37 decks +2% synergy
Alrund's Epiphany
9% of 35 decks +8% synergy
Quasiduplicate
8% of 36 decks +7% synergy
Turntimber Symbiosis
8% of 36 decks +6% synergy
Personal Tutor
8% of 37 decks +7% synergy
Ezuri's Predation
8% of 37 decks +5% synergy
Explosive Vegetation
8% of 37 decks +5% synergy
Triumph of the Hordes
8% of 37 decks +5% synergy
Shamanic Revelation
8% of 37 decks -1% synergy
Rishkar's Expertise
8% of 37 decks -2% synergy
Windfall
8% of 37 decks -5% synergy
Utility Artifacts
Lightning Greaves
24% of 37 decks -1% synergy
Crystal Shard
19% of 37 decks +18% synergy
Conjurer's Closet
19% of 37 decks +17% synergy
The One Ring
19% of 27 decks +10% synergy
Scroll Rack
16% of 37 decks +15% synergy
Helm of the Host
16% of 37 decks +13% synergy
Mirror Box
15% of 34 decks +14% synergy
Isochron Scepter
14% of 37 decks +11% synergy
Sensei's Divining Top
14% of 37 decks +8% synergy
Swiftfoot Boots
14% of 37 decks -14% synergy
Bootleggers' Stash
12% of 33 decks +10% synergy
Twinning Staff
11% of 36 decks +10% synergy
Ashnod's Altar
11% of 37 decks +3% synergy
The Great Henge
8% of 36 decks -2% synergy
Erratic Portal
8% of 37 decks +8% synergy
Cloudstone Curio
8% of 37 decks +7% synergy
Mimic Vat
8% of 37 decks +7% synergy
Panharmonicon
8% of 37 decks +4% synergy
Enchantments
Mystic Remora
35% of 37 decks +17% synergy
Sylvan Library
30% of 37 decks +18% synergy
Parallel Lives
19% of 37 decks +12% synergy
Sneak Attack
17% of 18 decks +14% synergy
Extravagant Replication
15% of 33 decks +14% synergy
Exploration
14% of 37 decks +5% synergy
Doubling Season
14% of 37 decks +5% synergy
Storm of Saruman
13% of 23 decks +11% synergy
Mana Reflection
11% of 37 decks +9% synergy
Zendikar Resurgent
11% of 37 decks +8% synergy
Burgeoning
11% of 37 decks +7% synergy
Wild Growth
11% of 37 decks -0% synergy
Mind's Dilation
8% of 37 decks +7% synergy
Carpet of Flowers
8% of 37 decks +4% synergy
Battles
Invasion of Ikoria
12% of 25 decks +7% synergy
Planeswalkers
Oko, Thief of Crowns
17% of 36 decks +11% synergy
Garruk, Primal Hunter
14% of 37 decks +11% synergy
Utility Lands
Reliquary Tower
57% of 37 decks +27% synergy
Boseiju, Who Endures
38% of 34 decks +19% synergy
Temple of the False God
27% of 37 decks +17% synergy
Ancient Tomb
27% of 37 decks +17% synergy
Otawara, Soaring City
24% of 34 decks +7% synergy
Alchemist's Refuge
22% of 37 decks +15% synergy
Yavimaya, Cradle of Growth
18% of 34 decks +8% synergy
Mystic Sanctuary
17% of 36 decks +4% synergy
Gaea's Cradle
16% of 37 decks +10% synergy
Rogue's Passage
14% of 37 decks -6% synergy
Urza's Saga
12% of 34 decks +5% synergy
Field of the Dead
8% of 36 decks +5% synergy
Wasteland
8% of 37 decks +7% synergy
Lumbering Falls
8% of 37 decks +6% synergy
Mana Artifacts
Sol Ring
97% of 37 decks +13% synergy
Arcane Signet
69% of 36 decks -3% synergy
Mana Crypt
30% of 37 decks +21% synergy
Simic Signet
30% of 37 decks +15% synergy
Izzet Signet
28% of 18 decks -1% synergy
Thought Vessel
24% of 37 decks +8% synergy
Talisman of Curiosity
22% of 36 decks +10% synergy
Mana Vault
19% of 37 decks +12% synergy
Jeweled Lotus
17% of 36 decks +11% synergy
Gruul Signet
17% of 18 decks +5% synergy
Chromatic Lantern
16% of 37 decks +7% synergy
Gilded Lotus
14% of 37 decks +10% synergy
Grim Monolith
11% of 37 decks +9% synergy
Mox Diamond
11% of 37 decks +6% synergy
Thran Dynamo
11% of 37 decks +6% synergy
Chrome Mox
11% of 37 decks +4% synergy
Lotus Petal
8% of 37 decks +1% synergy
Commander's Sphere
8% of 37 decks -7% synergy
Fellwar Stone
8% of 37 decks -13% synergy
Lands
Command Tower
86% of 37 decks +13% synergy
Breeding Pool
70% of 37 decks +29% synergy
Hinterland Harbor
68% of 37 decks +41% synergy
Steam Vents
67% of 18 decks +28% synergy
Stomping Ground
67% of 18 decks +25% synergy
Ketria Triome
65% of 17 decks +32% synergy
Rejuvenating Springs
58% of 36 decks +30% synergy
Misty Rainforest
57% of 37 decks +45% synergy
Rootbound Crag
50% of 18 decks +26% synergy
Izzet Boilerworks
44% of 18 decks +28% synergy
Frontier Bivouac
44% of 18 decks +17% synergy
Sulfur Falls
44% of 18 decks +14% synergy
Yavimaya Coast
43% of 37 decks +17% synergy
Underground River
43% of 7 decks +23% synergy
Llanowar Wastes
43% of 7 decks +17% synergy
Exotic Orchard
41% of 37 decks +5% synergy
Gruul Turf
39% of 18 decks +23% synergy
Dreamroot Cascade
35% of 34 decks +17% synergy
Taiga
33% of 18 decks +20% synergy
Simic Growth Chamber
32% of 37 decks +13% synergy
Tropical Island
30% of 37 decks +16% synergy
Karplusan Forest
28% of 18 decks +11% synergy
Spire Garden
28% of 18 decks +4% synergy
Shivan Reef
28% of 18 decks +1% synergy
Wooded Foothills
27% of 37 decks +17% synergy
Scalding Tarn
27% of 37 decks +16% synergy
Evolving Wilds
27% of 37 decks +6% synergy
Vineglimmer Snarl
26% of 35 decks +15% synergy
Flooded Grove
24% of 37 decks +12% synergy
Training Center
24% of 17 decks -4% synergy
Volcanic Island
22% of 18 decks +8% synergy
Cinder Glade
22% of 18 decks -16% synergy
Verdant Catacombs
22% of 37 decks +10% synergy
Barkchannel Pathway
20% of 35 decks +11% synergy
Reflecting Pool
19% of 37 decks +14% synergy
Temple of Mystery
19% of 37 decks +2% synergy
Myriad Landscape
19% of 37 decks -1% synergy
Botanical Sanctum
14% of 37 decks +10% synergy
Flooded Strand
14% of 37 decks +3% synergy
Terramorphic Expanse
14% of 37 decks -2% synergy
Rimewood Falls
11% of 35 decks +6% synergy
Waterlogged Grove
11% of 36 decks +4% synergy
Fabled Passage
11% of 36 decks +2% synergy
Gemstone Caverns
11% of 37 decks +6% synergy
Mana Confluence
11% of 37 decks +3% synergy
City of Brass
11% of 37 decks +3% synergy
Windswept Heath
11% of 37 decks +0% synergy
Polluted Delta
11% of 37 decks -0% synergy
Tangled Islet
9% of 33 decks +1% synergy
Littjara Mirrorlake
9% of 35 decks +7% synergy