Layla Hassan, Ugin's Nexus, Isochron Scepter, Pull from Eternity, and Grinding Station

Prerequisites

• Layla Hassan on the battlefield
• Ugin's Nexus on the battlefield
• Isochron Scepter on the battlefield
• Pull from Eternity in exile
• Grinding Station on the battlefield
• You control at least one Assassin that cannot be blocked by an opponent
• each extra turn available

Steps

1. Activate Grinding Station by tapping it and sacrificing Ugin's Nexus, causing target player to mill three cards
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. Deal combat damage to an opponent using an Assassin, triggering Layla Hassan, returning Ugin's Nexus from your graveyard to your hand
7. Cast Ugin's Nexus by paying
8. When Ugin's Nexus enters the battlefield, Grinding Station triggers, untapping Grinding Station
9. Repeat

Results

• Infinite turns