Polyraptor + Forerunner of the Empire

Polyraptor

Forerunner of the Empire

How it works

1. Give Forerunner of the Empire indestructible by any method.
2. Cast Polyraptor by paying 6.
3. Polyraptor enters the battlefield, triggering Forerunner of the Empire, causing it to deal 1 damage to each creature.
4. All Polyraptor creatures trigger.
5. Resolve one Polyraptor trigger, creating one token copy of Polyraptor.
6. Repeat from step 3 any number of times.
7. End the loop by declining to deal damage with Forerunner of the Empire triggers and resolving an arbitrarily high number of Polyraptor triggers.

By granting Forerunner of the Empire indestructible protection, this loop transforms a simple search-and-pelt effect into an engine of endless replication. When you cast Polyraptor, the newcomer triggers the Forerunner to ping the entire board, which deals damage safely to your invincible goblin-scout while enraging the Polyraptor to spawn an exact token copy of itself. Because that newly created token is also a Dinosaur, it loops right back into Forerunner of the Empire's triggered ability, letting you repeat this explosive cycle as many times as you desire to flood the battlefield with an infinite army of snapping jaws.