Audacious Reshapers + Mortuary + Intruder Alarm + Reservoir Walker

Audacious Reshapers

Mortuary

Intruder Alarm

Reservoir Walker

How it works

1. Activate Audacious Reshapers by tapping it and sacrificing Reservoir Walker.
2. When Reservoir Walker dies, Mortuary triggers, putting Reservoir Walker on top of your library from your graveyard.
3. Resolve the Audacious Reshapers ability, revealing Reservoir Walker from the top of your library, then putting it onto the battlefield and dealing 1 damage to you.
4. When Reservoir Walker enters the battlefield, it and Intruder Alarm trigger.
5. Resolve the Intruder Alarm trigger, untapping all creatures.
6. Resolve the Reservoir Walker trigger, causing you to gain 3 life and to get EEE.
7. Repeat.

This clever loop leverages Mortuary to ensure that whenever Reservoir Walker is sacrificed to Audacious Reshapers, it bypasses the graveyard entirely and returns directly to the top of your library. From there, Audacious Reshapers effortlessly unearths it back onto the battlefield, paying off the small life penalty with the 3 life you gain each time the Walker enters. Finally, Intruder Alarm catches every single one of those creature entries to untap Audacious Reshapers, leaving your entire assembly ready to repeat the process indefinitely for boundless energy and triggers.