Trench Behemoth, Fastbond, and Crypt of the Eternals

Prerequisites

• Trench Behemoth on the battlefield
• Fastbond on the battlefield
• Crypt of the Eternals on the battlefield

Steps

1. Activate Trench Behemoth by returning Crypt of the Eternals from the battlefield to your hand, untapping it
2. Play Crypt of the Eternals, triggering it and Fastbond
3. Resolve the Crypt of the Eternals trigger, causing you to gain 1 life
4. Resolve the Fastbond trigger, dealing 1 damage to you
5. Activate Crypt of the Eternals' first ability by tapping it, adding
6. Repeat

Results

• Infinite colorless mana
• Infinite landfall triggers
• Infinite lifegain triggers