Trench Behemoth + Fastbond + Plaza of Harmony

Trench Behemoth

Fastbond

Plaza of Harmony

How it works

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 C or one mana of any type a Gate you control could produce.
6. Repeat.

This vintage-legal loop turns a simple land bounce into an engine of endless resources by leveraging Fastbond to bypass normal land limits so you can continuously replay Plaza of Harmony. Each cycle relies on Trench Behemoth's activated ability to scoop the land back to your hand and untap itself at the cost of a land return, which Plaza of Harmony then offsets by netting you mana and life while Fastbond keeps the sequence legal despite the repetition. The resulting loop absorbs the self-inflicted damage through the constant life padding of Plaza of Harmony, ultimately yielding infinite mana, life, and landfall triggers.