The Locust God + Smothering Abomination + Goblin Bombardment

The Locust God

Smothering Abomination

Goblin Bombardment

How it works

1. Activate Goblin Bombardment by sacrificing another creature.
2. Smothering Abomination's second ability triggers, causing you to draw a card.
3. The Locust God triggers, creating a 1/1 Insect creature token with flying and haste.
4. Resolve the Goblin Bombardment ability, dealing 1 damage to any target.
5. Repeat.

This looping engine feeds on itself by converting a single sacrifice into a cascade of card draw and insect creation. You kick off the cycle by using Goblin Bombardment to sacrifice a creature, which in turn causes Smothering Abomination's triggered ability to draw you a card. That drawn card immediately rouses The Locust God, which replaces the draw with a fresh 1/1 Insect token ready to be sacrificed right back to Goblin Bombardment to keep the loop going.