Shifting Woodland, and Time Vault

Prerequisites

• Shifting Woodland on the battlefield
• Time Vault in the graveyard
• each turn available

Steps

1. Activate Shifting Woodland by paying , causing it to become a copy of Time Vault until end of turn
2. Activate Shifting Woodland by tapping it, causing you to take an extra turn after this one
3. Repeat each turn

Results

• Infinite turns
• Lock