Missy + Skirk Alarmist + Intruder Alarm + Goblin Bombardment

Missy

Skirk Alarmist

Intruder Alarm

Goblin Bombardment

How it works

1. Activate Goblin Bombardment by sacrificing another nontoken nonartifact creature.
2. When the creature dies, Missy's first ability triggers, returning the creature from your graveyard to the battlefield face down as a 2/2 Cyberman artifact creature.
3. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
4. Resolve the Goblin Bombardment ability from step 1, dealing 1 damage to any target.
5. Activate Skirk Alarmist by tapping it, turning the creature face up.
6. Repeat.

This intricate loop turns any disposable creature into an endless engine of destruction by leveraging Missy's necromancy alongside Goblin Bombardment's sacrifice outlet. When you sacrifice a creature to the Bombardment, Missy immediately brings it back to the battlefield face down and tapped as a 2/2 Cyberman artifact creature, neatly triggering Intruder Alarm to untap all your creatures—including Skirk Alarmist. You can then use Skirk Alarmist's tap ability to flip the creature back face up, resetting it to be sacrificed all over again while Intruder Alarm keeps the whole board fresh and ready to repeat the cycle indefinitely.