Requires

Emry, Lurker of the Loch must be on the battlefield. Ugin's Nexus must be on the battlefield. Isochron Scepter must be on the battlefield. Pull from Eternity must be in exile (exiled by Isochron Scepter). Krark-Clan Ironworks must be on the battlefield. Mana needed: each extra turn

Steps

1. Activate Krark-Clan Ironworks by sacrificing Ugin's Nexus, adding .
2. When Ugin's Nexus is sacrificed, it is exiled instead of being put into your graveyard, causing you to take an extra turn after this one.
3. Move to your next turn.
4. Activate Isochron Scepter by paying and tapping it, casting a copy of Pull from Eternity without paying its mana cost.
5. Resolve Pull from Eternity, putting Ugin's Nexus from exile into your graveyard.
6. Activate Emry by tapping it, targeting Ugin's Nexus.
7. Cast Ugin's Nexus from your graveyard by paying .
8. Repeat.

Results