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.

Kruphix, God of Horizons
0.06% of 3101 decks 2 decks
Morska, Undersea Sleuth
0.02% of 4481 decks 1 decks
Mirko, Obsessive Theorist
0.02% of 5110 decks 1 decks
Lara Croft, Tomb Raider
0.04% of 2378 decks 1 decks
Kairi, the Swirling Sky
0.32% of 314 decks 1 decks
Muldrotha, the Gravetide
0.01% of 15039 decks 1 decks
Urza, Chief Artificer
0.01% of 14262 decks 1 decks
Dynaheir, Invoker Adept
0.07% of 1397 decks 1 decks
Arcum Dagsson
0.08% of 1326 decks 1 decks
Jacob Hauken, Inspector
0.09% of 1158 decks 1 decks
Tawnos, Solemn Survivor
0.10% of 958 decks 1 decks
Falco Spara, Pactweaver
0.02% of 4627 decks 1 decks
Urtet, Remnant of Memnarch
0.01% of 14085 decks 1 decks
High Synergy Cards
Ancient Den
83% of 6 decks +78% synergy
Fabricate
64% of 14 decks +58% synergy
Artificer Class
57% of 14 decks +56% synergy
Academy Ruins
43% of 14 decks +38% synergy
Seat of the Synod
43% of 14 decks +36% synergy
Inventors' Fair
36% of 14 decks +32% synergy
Darksteel Citadel
36% of 14 decks +32% synergy
Buried Ruin
36% of 14 decks +30% synergy
Etherium Sculptor
36% of 14 decks +30% synergy
Tamiyo's Journal
29% of 14 decks +28% synergy
Top Cards
Swords to Plowshares
83% of 6 decks +21% synergy
Counterspell
50% of 14 decks +7% synergy
Negate
36% of 14 decks +13% synergy
Swiftfoot Boots
36% of 14 decks +8% synergy
Myr Battlesphere
29% of 14 decks +26% synergy
Unwinding Clock
29% of 14 decks +26% synergy
Urza, Lord High Artificer
29% of 14 decks +25% synergy
Emry, Lurker of the Loch
29% of 14 decks +24% synergy
Foundry Inspector
29% of 14 decks +24% synergy
Rhystic Study
29% of 14 decks +1% synergy
Creatures
Drafna, Founder of Lat-Nam
23% of 13 decks +22% synergy
Timestream Navigator
21% of 14 decks +21% synergy
Jin-Gitaxias, Progress Tyrant
21% of 14 decks +18% synergy
The Reality Chip
21% of 14 decks +17% synergy
Instants
Dispatch
50% of 6 decks +45% synergy
Enlightened Tutor
50% of 6 decks +32% synergy
Arcane Denial
21% of 14 decks +2% synergy
An Offer You Can't Refuse
21% of 14 decks +1% synergy
Cyclonic Rift
21% of 14 decks -7% synergy
Sorceries
Demonic Tutor
60% of 5 decks +38% synergy
Organic Extinction
50% of 6 decks +47% synergy
Cultivate
43% of 7 decks -4% synergy
Time Warp
21% of 14 decks +19% synergy
Ravenform
21% of 14 decks +18% synergy
Utility Artifacts
Time Sieve
60% of 5 decks +57% synergy
Encroaching Mycosynth
25% of 12 decks +24% synergy
Mindslaver
21% of 14 decks +21% synergy
Darksteel Forge
21% of 14 decks +20% synergy
Lightning Greaves
21% of 14 decks -4% synergy
Enchantments
Doubling Season
43% of 7 decks +34% synergy
Mirrodin Besieged
21% of 14 decks +19% synergy
Planeswalkers
Tamiyo, Collector of Tales
43% of 7 decks +41% synergy
Tamiyo, Compleated Sage
43% of 7 decks +41% synergy
Tamiyo, the Moon Sage
21% of 14 decks +21% synergy
Karn, the Great Creator
21% of 14 decks +20% synergy
Utility Lands
Vault of Whispers
60% of 5 decks +55% synergy
Mystic Sanctuary
29% of 14 decks +16% synergy
Otawara, Soaring City
29% of 14 decks +12% synergy
Reliquary Tower
29% of 14 decks -1% synergy
Minamo, School at Water's Edge
21% of 14 decks +17% synergy
Karn's Bastion
21% of 14 decks +16% synergy
Urza's Saga
21% of 14 decks +14% synergy
Mana Artifacts
Sol Ring
86% of 14 decks +1% synergy
Arcane Signet
64% of 14 decks -8% synergy
Simic Signet
43% of 7 decks +28% synergy
Mox Opal
21% of 14 decks +17% synergy
Lands
Goldmire Bridge
100% of 3 decks +95% synergy
Yavimaya Coast
71% of 7 decks +45% synergy
Razortide Bridge
67% of 6 decks +60% synergy
Hallowed Fountain
67% of 6 decks +26% synergy
Command Tower
64% of 14 decks -10% synergy
Mistvault Bridge
60% of 5 decks +55% synergy
Watery Grave
60% of 5 decks +19% synergy
Breeding Pool
43% of 7 decks +2% synergy
Exotic Orchard
29% of 14 decks -7% synergy
Glimmervoid
21% of 14 decks +21% synergy