Time Vault, and Fatestitcher

Prerequisites

• Time Vault on the battlefield
• Fatestitcher on the battlefield
• Fatestitcher does not have summoning sickness

Steps

1. Activate Fatestitcher by tapping it, untap Time Vault
2. Activate Time Vault by tapping it, causing you to take an extra turn after this one
3. Repeat each turn

Results

• Infinite turns