Audacious Reshapers + Mortuary + Intruder Alarm + Guardian Automaton

Audacious Reshapers

Mortuary

Intruder Alarm

Guardian Automaton

How it works

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

This cunning loop relies on manipulating the top of your library to continuously cheat out the very artifact you sacrifice. By feeding Guardian Automaton to Audacious Reshapers, you trigger Mortuary to neatly recycle the automaton right back to the top of your library where the reshapers' search effect will instantly find it again. Meanwhile, Intruder Alarm acts as the engine's heartbeat, using Guardian Automaton's entrance to untap your creatures so the process can repeat indefinitely while offsetting the reshapers' self-inflicted damage with the automaton's life-gaining death trigger.