Saw, Ugin's Nexus, and Esoteric Duplicator

Prerequisites

• Saw on the battlefield
• Ugin's Nexus on the battlefield
• Esoteric Duplicator on the battlefield
• each turn available

Steps

1. Declare the creature with Saw attached as an attacker
2. Saw triggers, causing you to sacrifice Ugin's Nexus and draw a card
3. Ugin's Nexus is exiled instead of being put into your graveyard, causing you to take an extra turn after this one
4. Esoteric Duplicator triggers, causing you to pay to create a token copy of Ugin's Nexus at the beginning of your next end step
5. Move to your extra turn
6. At the beginning of your end step, Esoteric Duplicator triggers, creating a token copy of Ugin's Nexus
7. Repeat

Results

• Infinite turns