Osgir, the Reconstructor
Karn, the Great Creator
Ugin's Nexus
Birgi, God of Storytelling
Mondrak, Glory Dominus
1

   Prerequisites

What do I need to start this combo?
Ugin's Nexus in your graveyard.
All other permanents on the battlefield (Birgi on the battlefield as Harnfel, Horn of Bounty on the battlefield).
5 available, with an additional 5 every fourth turn available

   Steps

How does this combo work?
1
Activate Osgir by paying 5, tapping it and exiling Ugin's Nexus from your graveyard, creating four token copies of Ugin's Nexus.
2
Put three of the Ugin's Nexus tokens into exile due to the legend rule and their replacement effects, causing you to take three extra turns after this one.
3
Activate Karn's first loyalty ability by putting a loyalty counter on it, choosing to do nothing.
4
Move to your next extra turn.
5
Repeat from step 3 one additional time.
6
Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Ugin's Nexus from exile to your hand.
7
Activate Harnfel by discarding Ugin's Nexus.
8
Move to your last extra turn.
9
Repeat.

   Results

What do I get from this combo?
Infinite turns
Osgir, the Reconstructor
0.02% of 5308 decks 1 decks
Game Changers
Lion's Eye Diamond
100% of 1 decks +99% synergy
Underworld Breach
100% of 1 decks +98% synergy
Mox Diamond
100% of 1 decks +97% synergy
Drannith Magistrate
100% of 1 decks +94% synergy
Gamble
100% of 1 decks +93% synergy
Ancient Tomb
100% of 1 decks +92% synergy
Deflecting Swat
100% of 1 decks +85% synergy
Enlightened Tutor
100% of 1 decks +83% synergy
Jeska's Will
100% of 1 decks +82% synergy
Smothering Tithe
100% of 1 decks +79% synergy
Creatures
Voltaic Construct
100% of 1 decks +100% synergy
Metalworker
100% of 1 decks +100% synergy
Goblin Sharpshooter
100% of 1 decks +99% synergy
Heliod, Sun-Crowned
100% of 1 decks +99% synergy
Arcbound Ravager
100% of 1 decks +99% synergy
Walking Ballista
100% of 1 decks +98% synergy
Gandalf the White
100% of 1 decks +98% synergy
Stuffy Doll
100% of 1 decks +97% synergy
Hellkite Tyrant
100% of 1 decks +97% synergy
Ranger-Captain of Eos
100% of 1 decks +96% synergy
Ethersworn Canonist
100% of 1 decks +95% synergy
Marvin, Murderous Mimic
100% of 1 decks +95% synergy
Goblin Engineer
100% of 1 decks +95% synergy
Foundry Inspector
100% of 1 decks +92% synergy
Grand Abolisher
100% of 1 decks +89% synergy
Imperial Recruiter
100% of 1 decks +89% synergy
Solemn Simulacrum
100% of 1 decks +77% synergy
Esper Sentinel
100% of 1 decks +74% synergy
Instants
Silence
100% of 1 decks +95% synergy
Boros Charm
100% of 1 decks +48% synergy
Path to Exile
100% of 1 decks +43% synergy
Swords to Plowshares
100% of 1 decks +33% synergy
Sorceries
Wheel of Fortune
100% of 1 decks +97% synergy
Sevinne's Reclamation
100% of 1 decks +89% synergy
Utility Artifacts
Mirror of Fate
100% of 1 decks +100% synergy
Tangle Wire
100% of 1 decks +100% synergy
Codex Shredder
100% of 1 decks +100% synergy
Defense Grid
100% of 1 decks +100% synergy
Animation Module
100% of 1 decks +99% synergy
Mycosynth Lattice
100% of 1 decks +99% synergy
Mirage Mirror
100% of 1 decks +99% synergy
Krark-Clan Ironworks
100% of 1 decks +99% synergy
Cloud Key
100% of 1 decks +98% synergy
Unwinding Clock
100% of 1 decks +98% synergy
Staff of Domination
100% of 1 decks +98% synergy
Blazing Sunsteel
100% of 1 decks +98% synergy
Sensei's Divining Top
100% of 1 decks +98% synergy
Rings of Brighthearth
100% of 1 decks +97% synergy
Aetherflux Reservoir
100% of 1 decks +97% synergy
Sculpting Steel
100% of 1 decks +95% synergy
Lotus Petal
100% of 1 decks +95% synergy
Basilisk Collar
100% of 1 decks +89% synergy
Shadowspear
100% of 1 decks +89% synergy
Wayfarer's Bauble
100% of 1 decks +85% synergy
Lightning Greaves
100% of 1 decks +73% synergy
Enchantments
Rule of Law
100% of 1 decks +98% synergy
Deafening Silence
100% of 1 decks +95% synergy
Anointed Procession
100% of 1 decks +91% synergy
Planeswalkers
Daretti, Scrap Savant
100% of 1 decks +95% synergy
Utility Lands
Treasure Vault
100% of 1 decks +98% synergy
Darksteel Citadel
100% of 1 decks +93% synergy
Urza's Saga
100% of 1 decks +91% synergy
Ancient Den
100% of 1 decks +89% synergy
Great Furnace
100% of 1 decks +89% synergy
Reliquary Tower
100% of 1 decks +82% synergy
Mana Artifacts
Gilded Lotus
100% of 1 decks +98% synergy
Basalt Monolith
100% of 1 decks +97% synergy
Mox Opal
100% of 1 decks +96% synergy
Thran Dynamo
100% of 1 decks +95% synergy
Mox Amber
100% of 1 decks +95% synergy
Cursed Mirror
100% of 1 decks +92% synergy
Sol Ring
100% of 1 decks +14% synergy
Lands
Gemstone Caverns
100% of 1 decks +96% synergy
Plateau
100% of 1 decks +88% synergy
Rustvale Bridge
100% of 1 decks +88% synergy
Arid Mesa
100% of 1 decks +72% synergy
Temple of Triumph
100% of 1 decks +59% synergy
Spectator Seating
100% of 1 decks +58% synergy
Sacred Foundry
100% of 1 decks +58% synergy
Boros Garrison
100% of 1 decks +57% synergy
Command Tower
100% of 1 decks +14% synergy