Ratadrabik of Urborg + Leyline of Singularity + Treva's Attendant

Ratadrabik of Urborg

Leyline of Singularity

Treva's Attendant

How it works

1. Activate Treva's Attendant by paying 1 and sacrificing it.
2. When Treva's Attendant dies, Ratadrabik triggers, creating a token copy of Treva's Attendant that is a 2/2 legendary Zombie in addition to its other types.
3. Repeat using the Treva's Attendant token

This clever loop relies on Leyline of Singularity to fundamentally rewrite the board state, turning every nonland permanent into a legendary creature so that Ratadrabik of Urborg can recognize them. Once this global rule is active, sacrificing Treva's Attendant triggers Ratadrabik's ability to create a non-legendary copy, which is itself a Zombie thanks to Ratadrabik and legendary thanks to the Leyline. Because this newly spawned copy is also legendary in the eyes of Ratadrabik, it can be sacrificed to Treva's Attendant's ability again and again, generating an endless supply of mana and triggers.