Ratadrabik of Urborg + Leyline of Singularity + Vizier of Many Faces

Ratadrabik of Urborg

Leyline of Singularity

Vizier of Many Faces

How it works

1. Cast Vizier of Many Faces by paying its mana cost. Choose to have it enter as a copy of Ratadrabik.
2. Put Vizier of Many Faces into your graveyard due to the legend rule.
3. When Vizier of Many Faces dies, Ratadrabik triggers, creating a token copy of Vizier of Many Faces that is a copy of Ratadrabik but is a 2/2 Zombie in addition to its other types.
4. Repeat from step 2 using the Vizier of Many Faces token instead.

This ingenious loop relies on Leyline of Singularity to turn all nonland permanents into legendary cards, setting the stage for Ratadrabik of Urborg and Vizier of Many Faces to interact in a perpetual cycle of rebirth. When you cast Vizier of Many Faces as a copy of Ratadrabik, the legend rule immediately puts it into the graveyard, which triggers Ratadrabik to create a non-legendary token copy of the Vizier. Because Leyline of Singularity makes that new token legendary as well, the legend rule immediately takes it down too, triggering another copy and forcing an unescapable loop of infinite death triggers and enters-the-battlefield events that draws the game.