Mesmeric Orb, and Tidewater Minion

Prerequisites

• Mesmeric Orb on the battlefield
• Tidewater Minion on the battlefield

Steps

1. Activate Tidewater Minion's last ability by tapping it, untapping itself
2. When Tidewater Minion becomes untapped, Mesmeric Orb triggers, causing you to mill a card
3. Repeat

Results

• Infinite self-mill