Emry, Lurker of the Loch + Ugin's Nexus + Isochron Scepter + Pull from Eternity + Bartolomé del Presidio

Emry, Lurker of the Loch

Ugin's Nexus

Isochron Scepter

Pull from Eternity

Bartolomé del Presidio

How it works

1. Activate Bartolomé del Presidio by sacrificing Ugin's Nexus, putting a +1/+1 counter on it.
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 2 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 5.
8. Repeat.

This intricate loop harnesses the self-replacement effect of Ugin's Nexus to generate infinite turns, turning a sacrifice into a time-bending trigger. To pull it off, Bartolomé del Presidio acts as the sacrificial outlet that sends the Nexus straight into exile, successfully banking an extra turn while Isochron Scepter holds the key to recycling it. Since the Nexus exiles itself, Pull from Eternity is the vital bridge needed to fish it back out of exile and drop it into your graveyard. From there, Emry, Lurker of the Loch steps in to let you recast the artifact from the graveyard, resetting the whole cycle once you pay its cost.