Phyrexian Swarmlord, Time Sieve, and Mycosynth Lattice

Prerequisites

• Phyrexian Swarmlord on the battlefield
• Time Sieve on the battlefield
• Mycosynth Lattice on the battlefield
• Opponents have at least five poison counters

Steps

1. At the beginning of your upkeep, Phyrexian Swarmlord triggers, creating at least five 1/1 Phyrexian Insect creature tokens
2. Activate Time Sieve by tapping it and sacrificing five Phyrexian Infects, causing you to take an extra turn after this one
3. Repeat each turn

Results

• Infinite turns