Trench Behemoth, Fastbond, and Plaza of Harmony

Prerequisites

• Trench Behemoth on the battlefield
• Fastbond on the battlefield
• Plaza of Harmony on the battlefield
• You control at least two Gates

Steps

1. Activate Trench Behemoth by returning Plaza of Harmony from the battlefield to your hand, untapping it
2. Play Plaza of Harmony, triggering it and Fastbond
3. Resolve the Plaza of Harmony trigger, causing you to gain 3 life
4. Resolve the Fastbond trigger, dealing 1 damage to you
5. Activate Plaza of Harmony by tapping it, adding either or one mana of any type a Gate you control could produce
6. Repeat

Results

• Infinite colorless mana
• Infinite landfall triggers
• Infinite lifegain
• Infinite lifegain triggers
• Infinite mana Gates you control can produce