Ratadrabik of Urborg + Leyline of Singularity + Sidisi, Undead Vizier

Ratadrabik of Urborg

Leyline of Singularity

Sidisi, Undead Vizier

How it works

1. Cast Sidisi by paying its mana cost.
2. When Sidisi enters, it triggers, causing you to sacrifice it.
3. When Sidisi dies, it and Ratadrabik trigger.
4. Resolve the Sidisi trigger, allowing you to tutor a card to your hand.
5. Resolve the Ratadrabik trigger, creating a token copy of Sidisi that is a 2/2 legendary Zombie in addition to its other types.
6. Repeat from step 2 using the Sidisi token instead.