Pearl-Ear, Imperial Advisor + Cloudstone Curio + Ugin's Mastery + Case of the Shattered Pact

Pearl-Ear, Imperial Advisor

Cloudstone Curio

Ugin's Mastery

Case of the Shattered Pact

How it works

1. Cast Ugin's Mastery by paying 0 due to Pearl-Ear.
2. When Ugin's Mastery enters the battlefield, Cloudstone Curio triggers, returning Case of the Shattered Pact from the battlefield to your hand.
3. Cast Case of the Shattered Pact by paying 0 due to Pearl-Ear.
4. When Case of the Shattered Pact enters the battlefield, it and Cloudstone Curio trigger.
5. Resolve the Case of the Shattered Pact trigger, causing you to search your library for a basic land card and put it into your hand.
6. Resolve the Cloudstone Curio trigger, returning Ugin's Mastery from the battlefield to your hand.
7. Repeat.