Trench Behemoth + Fastbond + Dismal Backwater

Trench Behemoth

Fastbond

Dismal Backwater

How it works

1. Activate Trench Behemoth by returning Dismal Backwater from the battlefield to your hand, untapping it.
2. Play Dismal Backwater, triggering it and Fastbond.
3. Resolve the Dismal Backwater trigger, causing you to gain 1 life.
4. Resolve the Fastbond trigger, dealing 1 damage to you.
5. Repeat.

This vintage-legal loop turns a simple bounce-and-replay engine into a self-sustaining cycle of life and trigger generation. By using Trench Behemoth's activated ability to scoop up Dismal Backwater and untap itself, you clear the way to immediately replay the land. Fastbond removes turnly land limits while working in tandem with Dismal Backwater's entry trigger to net you one life for every iteration, perfectly offsetting the self-inflicted damage from Fastbond's downside.