Skullbriar, the Walking Grave + Illicit Masquerade + Perigee Beckoner + Yahenni, Undying Partisan

Skullbriar, the Walking Grave

Illicit Masquerade

Perigee Beckoner

Yahenni, Undying Partisan

How it works

1. Cast Illicit Masquerade by paying 3. When it enters, its first ability triggers, putting an impostor counter on Skullbriar.
2. Cast Perigee Beckoner for its warp cost by paying 1.
3. When Perigee Beckoner enters, it triggers, targeting Skullbriar.
4. Activate Yahenni by sacrificing Perigee Beckoner.
5. Activate Yahenni by sacrificing Skullbriar.
6. When Skullbriar dies, Illicit Masquerade's second ability and Skullbriar's ability granted to it by Perigee Beckoner trigger.
7. Resolve the Skullbriar trigger, returning it from your graveyard to the battlefield.
8. Resolve the Illicit Masquerade trigger, failing to exile Skullbriar as it has left your graveyard and returning Perigee Beckoner from your graveyard to the battlefield.
9. Resolve the Yahenni ability from step 5.
10. Repeat from step 3.