Ratadrabik of Urborg + Leyline of Singularity + Goblin Firestarter

Ratadrabik of Urborg

Leyline of Singularity

Goblin Firestarter

How it works

1. Activate Goblin Firestarter by sacrificing it.
2. When Goblin Firestarter dies, Ratadrabik triggers, creating a token copy of Goblin Firestarter that is a 2/2 legendary Zombie in addition to its other types.
3. Resolve the Goblin Firestarter ability.
4. Repeat using the Goblin Firestarter token

By turning the entire battlefield legendary with Leyline of Singularity, any nonland permanent you control instantly qualifies for Ratadrabik of Urborg's watchful eye. When you sacrifice Goblin Firestarter to ping any target, Ratadrabik intercepts its death by creating a fresh, non-legendary copy that conveniently retains its burning ability. Because Leyline of Singularity forces this brand-new token to also be legendary, the loop seamlessly restarts itself, letting you repeat the sacrifice to roast your opponents out of the game with infinite damage.