Ugin's Nexus + Tamiyo's Compleation + Mechanized Production

Ugin's Nexus
Tamiyo's Compleation
Mechanized Production

Requires
Ugin's Nexus must be on the battlefield. Tamiyo's Compleation must be on the battlefield. Mechanized Production must be on the battlefield. Tamiyo's Compleation and Mechanized Production both attached to Ugin's Nexus.
Steps
  1. At the beginning of your upkeep, Mechanized Production triggers, creating a token copy of Ugin's Nexus.
  2. The token copy of Ugin's Nexus is put into exile as a state based action due to the legend rule, causing you to take an extra turn after this one.
  3. Move to your next turn.
  4. Repeat.
Results
Infinite turns.

Lara Croft, Tomb Raider
0.04% of 2387 decks 1 decks
Muldrotha, the Gravetide
0.01% of 15112 decks 1 decks
Urtet, Remnant of Memnarch
0.01% of 14156 decks 1 decks
Jacob Hauken, Inspector
0.09% of 1169 decks 1 decks
Urza, Chief Artificer
0.01% of 14102 decks 1 decks
Arcum Dagsson
0.08% of 1318 decks 1 decks
Kruphix, God of Horizons
0.03% of 3079 decks 1 decks
Kairi, the Swirling Sky
0.32% of 313 decks 1 decks
Dynaheir, Invoker Adept
0.07% of 1378 decks 1 decks
Mirko, Obsessive Theorist
0.02% of 5144 decks 1 decks
Morska, Undersea Sleuth
0.02% of 4505 decks 1 decks
Tawnos, Solemn Survivor
0.11% of 949 decks 1 decks
Falco Spara, Pactweaver
0.02% of 4602 decks 1 decks
High Synergy Cards
Ancient Den
83% of 6 decks +78% synergy
Fabricate
62% of 13 decks +55% synergy
Artificer Class
54% of 13 decks +53% synergy
Academy Ruins
46% of 13 decks +41% synergy
Seat of the Synod
46% of 13 decks +40% synergy
Inventors' Fair
38% of 13 decks +35% synergy
Buried Ruin
38% of 13 decks +33% synergy
Etherium Sculptor
38% of 13 decks +33% synergy
Myr Battlesphere
31% of 13 decks +29% synergy
Unwinding Clock
31% of 13 decks +28% synergy
Top Cards
Swords to Plowshares
83% of 6 decks +21% synergy
Counterspell
46% of 13 decks +3% synergy
Swiftfoot Boots
38% of 13 decks +11% synergy
Urza, Lord High Artificer
31% of 13 decks +28% synergy
Emry, Lurker of the Loch
31% of 13 decks +27% synergy
Foundry Inspector
31% of 13 decks +27% synergy
Negate
31% of 13 decks +8% synergy
Rhystic Study
31% of 13 decks +3% synergy
Creatures
Timestream Navigator
23% of 13 decks +22% synergy
Drafna, Founder of Lat-Nam
23% of 13 decks +22% synergy
Jin-Gitaxias, Progress Tyrant
23% of 13 decks +20% synergy
Instants
Dispatch
50% of 6 decks +45% synergy
Enlightened Tutor
50% of 6 decks +32% synergy
Arcane Denial
23% of 13 decks +4% synergy
An Offer You Can't Refuse
23% of 13 decks +3% synergy
Cyclonic Rift
23% of 13 decks -5% synergy
Sorceries
Demonic Tutor
60% of 5 decks +38% synergy
Organic Extinction
50% of 6 decks +47% synergy
Time Warp
23% of 13 decks +21% synergy
Ravenform
23% of 13 decks +20% synergy
Utility Artifacts
Time Sieve
60% of 5 decks +57% synergy
Encroaching Mycosynth
25% of 12 decks +24% synergy
Mindslaver
23% of 13 decks +23% synergy
Tamiyo's Journal
23% of 13 decks +22% synergy
Darksteel Forge
23% of 13 decks +22% synergy
Lightning Greaves
23% of 13 decks -2% synergy
Enchantments
Doubling Season
50% of 6 decks +41% synergy
Mirrodin Besieged
23% of 13 decks +21% synergy
Planeswalkers
Karn, the Great Creator
23% of 13 decks +22% synergy
Utility Lands
Vault of Whispers
60% of 5 decks +56% synergy
Darksteel Citadel
31% of 13 decks +27% synergy
Mystic Sanctuary
31% of 13 decks +18% synergy
Reliquary Tower
31% of 13 decks +1% synergy
Minamo, School at Water's Edge
23% of 13 decks +19% synergy
Karn's Bastion
23% of 13 decks +18% synergy
Urza's Saga
23% of 13 decks +16% synergy
Otawara, Soaring City
23% of 13 decks +6% synergy
Mana Artifacts
Sol Ring
85% of 13 decks +0% synergy
Arcane Signet
69% of 13 decks -3% synergy
Mox Opal
23% of 13 decks +19% synergy
Lands
Goldmire Bridge
100% of 3 decks +95% synergy
Command Tower
69% of 13 decks -5% synergy
Razortide Bridge
67% of 6 decks +60% synergy
Yavimaya Coast
67% of 6 decks +40% synergy
Hallowed Fountain
67% of 6 decks +26% synergy
Mistvault Bridge
60% of 5 decks +55% synergy
Watery Grave
60% of 5 decks +19% synergy
Breeding Pool
50% of 6 decks +9% synergy
Exotic Orchard
31% of 13 decks -5% synergy
Glimmervoid
23% of 13 decks +23% synergy