Hidetsugu, Devouring Chaos + Intruder Alarm + Arcbound Reclaimer + Myr Scrapling

Hidetsugu, Devouring Chaos

Intruder Alarm

Arcbound Reclaimer

Myr Scrapling

How it works

1. Activate Myr Scrapling by sacrificing itself, putting a +1/+1 counter on Arcbound Reclaimer.
2. Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting Myr Scrapling from your graveyard on top of your library.
3. Activate all mana-producing creatures you control by tapping them, adding at least 3.
4. Activate Hidetsugu's second ability by paying 2 and tapping it, exiling Myr Scrapling from the top of your library with the ability to cast it from exile this turn, and dealing 1 damage to any target.
5. Cast Myr Scrapling from exile by paying 1.
6. Myr Scrapling enters the battlefield, triggering Intruder Alarm, untapping all creatures.
7. Repeat.