Progenitor Mimic + Notorious Throng + Eternal Witness

Progenitor Mimic
Notorious Throng
Eternal Witness

Requires
Progenitor Mimic must be on the battlefield. Notorious Throng must be in hand. Eternal Witness must be on the battlefield. Progenitor Mimic on the battlefield as a copy of Eternal Witness. You control at least one Rogue that does not have summoning sickness and cannot be blocked by an opponent. Mana needed: 5 each turn
Steps
  1. Deal combat damage to an opponent using a Rogue.
  2. Cast Notorious Throng for its prowl cost by paying 5, causing you to take an extra turn after this one.
  3. At the beginning of your next upkeep, Progenitor Mimic triggers, creating a token copy of Eternal Witness.
  4. When the Eternal Witness token enters the battlefield, it triggers, returning Notorious Throng from your graveyard to your hand.
  5. Repeat.
Results
Infinite turns.

Rubinia Soulsinger
0.55% of 728 decks 4 decks
Gonti, Canny Acquisitor
0.04% of 5192 decks 2 decks
Esix, Fractal Bloom
0.06% of 3180 decks 2 decks
Ivy, Gleeful Spellthief
0.01% of 6841 decks 1 decks
Omo, Queen of Vesuva
0.02% of 5758 decks 1 decks
Felix Five-Boots
0.03% of 3292 decks 1 decks
Tasigur, the Golden Fang
0.02% of 5816 decks 1 decks
Riku of Two Reflections
0.02% of 4895 decks 1 decks
Archelos, Lagoon Mystic
0.03% of 3380 decks 1 decks
High Synergy Cards
Rite of Replication
43% of 14 decks +40% synergy
Parallel Lives
43% of 14 decks +36% synergy
Biovisionary
36% of 14 decks +35% synergy
Mirror Box
33% of 12 decks +32% synergy
Stolen by the Fae
31% of 13 decks +30% synergy
Maraleaf Pixie
31% of 13 decks +29% synergy
Reliquary Tower
57% of 14 decks +28% synergy
Spitting Image
29% of 14 decks +28% synergy
Sakashima of a Thousand Faces
31% of 13 decks +28% synergy
Sower of Temptation
29% of 14 decks +27% synergy
Top Cards
Cultivate
50% of 14 decks +4% synergy
Farseek
43% of 14 decks +9% synergy
Beast Within
43% of 14 decks +4% synergy
Avenger of Zendikar
36% of 14 decks +26% synergy
Growth Spiral
36% of 14 decks +14% synergy
Kodama's Reach
36% of 14 decks +4% synergy
Nature's Lore
36% of 14 decks +4% synergy
Edric, Spymaster of Trest
29% of 14 decks +26% synergy
Archaeomancer
29% of 14 decks +25% synergy
Acidic Slime
29% of 14 decks +25% synergy
Creatures
Changeling Outcast
60% of 5 decks +55% synergy
Archmage of Echoes
38% of 8 decks +36% synergy
Birds of Paradise
29% of 14 decks +2% synergy
Esix, Fractal Bloom
23% of 13 decks +21% synergy
Timeless Witness
23% of 13 decks +20% synergy
Adrix and Nev, Twincasters
23% of 13 decks +18% synergy
Ohran Frostfang
23% of 13 decks +18% synergy
Master of Waves
21% of 14 decks +21% synergy
Vendilion Clique
21% of 14 decks +21% synergy
Faerie Artisans
21% of 14 decks +21% synergy
Scryb Ranger
21% of 14 decks +20% synergy
Myr Battlesphere
21% of 14 decks +19% synergy
Slither Blade
21% of 14 decks +19% synergy
Deadeye Navigator
21% of 14 decks +19% synergy
Clever Impersonator
21% of 14 decks +19% synergy
Rashmi, Eternities Crafter
21% of 14 decks +19% synergy
Peregrine Drake
21% of 14 decks +18% synergy
Mulldrifter
21% of 14 decks +16% synergy
Phyrexian Metamorph
21% of 14 decks +14% synergy
Rampaging Baloths
21% of 14 decks +14% synergy
Reclamation Sage
21% of 14 decks +10% synergy
Solemn Simulacrum
21% of 14 decks +7% synergy
Instants
Assassin's Trophy
60% of 5 decks +30% synergy
Krosan Grip
29% of 14 decks +21% synergy
Brainstorm
29% of 14 decks +7% synergy
Counterspell
29% of 14 decks -14% synergy
Theoretical Duplication
23% of 13 decks +22% synergy
Mystic Reflection
23% of 13 decks +22% synergy
Double Major
23% of 13 decks +19% synergy
Ghostly Flicker
21% of 14 decks +17% synergy
Fact or Fiction
21% of 14 decks +15% synergy
Arcane Denial
21% of 14 decks +2% synergy
Cyclonic Rift
21% of 14 decks -7% synergy
Heroic Intervention
21% of 14 decks -8% synergy
Sorceries
Three Visits
36% of 14 decks +11% synergy
Skyshroud Claim
29% of 14 decks +19% synergy
Quasiduplicate
21% of 14 decks +20% synergy
Green Sun's Zenith
21% of 14 decks +15% synergy
Utility Artifacts
Bident of Thassa
29% of 14 decks +22% synergy
Swiftfoot Boots
29% of 14 decks +1% synergy
Thousand-Year Elixir
21% of 14 decks +19% synergy
Enchantments
Reconnaissance Mission
23% of 13 decks +18% synergy
Coastal Piracy
21% of 14 decks +20% synergy
Awakening Zone
21% of 14 decks +19% synergy
Kindred Discovery
21% of 14 decks +14% synergy
Utility Lands
Yavimaya, Cradle of Growth
31% of 13 decks +21% synergy
Thespian's Stage
21% of 14 decks +19% synergy
Mana Artifacts
Sol Ring
86% of 14 decks +1% synergy
Selesnya Signet
75% of 4 decks +66% synergy
Arcane Signet
38% of 13 decks -34% synergy
Simic Signet
29% of 14 decks +14% synergy
Fellwar Stone
21% of 14 decks +0% synergy
Lands
Seaside Citadel
100% of 4 decks +74% synergy
Command Tower
79% of 14 decks +5% synergy
Temple Garden
75% of 4 decks +34% synergy
Drowned Catacomb
60% of 5 decks +35% synergy
Woodland Cemetery
60% of 5 decks +32% synergy
Sunken Hollow
60% of 5 decks +25% synergy
Yavimaya Coast
50% of 14 decks +24% synergy
Hinterland Harbor
50% of 14 decks +23% synergy
Dreamroot Cascade
46% of 13 decks +28% synergy
Flooded Grove
36% of 14 decks +24% synergy
Temple of Mystery
36% of 14 decks +18% synergy
Simic Growth Chamber
29% of 14 decks +9% synergy
Exotic Orchard
29% of 14 decks -7% synergy
Breeding Pool
29% of 14 decks -13% synergy
Tangled Islet
25% of 12 decks +17% synergy
Rejuvenating Springs
23% of 13 decks -6% synergy
Misty Rainforest
21% of 14 decks +10% synergy
Path of Ancestry
21% of 14 decks +0% synergy