Animate Artifact, Time Vault, and Nature's Chosen

Prerequisites

• Animate Artifact on the battlefield
• Time Vault on the battlefield
• Nature's Chosen on the battlefield
• Animate Artifact and Nature's Chosen attached to Time Vault
• Time Vault does not have summoning sickness

Steps

1. Activate Time Vault by tapping it, causing you to take an extra turn after this one
2. Activate Nature's Chosen by paying , untapping Time Vault
3. Repeat each turn

Results

• Infinite turns