Scouring Swarm + Drownyard Temple + Ashnod's Altar + Troubled Healer

Scouring Swarm

Drownyard Temple

Ashnod's Altar

Troubled Healer

How it works

1. Activate Troubled Healer by sacrificing Drownyard Temple.
2. Each Scouring Swarm you control triggers, creating a tapped token copy of itself.
3. Resolve the Troubled Healer ability.
4. If you control four or more Scouring Swarms, activate Ashnod's Altar by sacrificing a Scouring Swarm, adding .
5. Repeat step 4 until you control three Scouring Swarms or until you have 3 available, whichever comes first.
6. Activate Drownyard Temple by paying 3, returning it from your graveyard to the battlefield.
7. Repeat.

This clever engine transforms simple land sacrifice into an overflowing cascade of value by letting Troubled Healer sacrifice Drownyard Temple repeatedly. Once your graveyard fills with enough land cards to satisfy Scouring Swarm's threshold, every sacrifice triggers a chain reaction that populates the battlefield with a growing army of flying token copies. Ashnod's Altar steps in to feed on this burgeoning swarm, converting your excess creatures into the colorless mana needed to resurrect Drownyard Temple from the graveyard and keep the cycle spinning infinitely.