Preston, the Vanisher + Sister Hospitaller + Yahenni, Undying Partisan + Chord of Calling

Preston, the Vanisher

Sister Hospitaller

Yahenni, Undying Partisan

Chord of Calling

How it works

1. Cast Chord of Calling by paying at most 6, searching your library for Sister Hospitaller and putting it onto the battlefield.
2. When Sister Hospitaller enters, it and Preston trigger.
3. Resolve the Sister Hospitaller trigger, returning an applicable target from your graveyard to the battlefield.
4. Holding priority, activate Yahenni by sacrificing Sister Hospitaller.
5. Resolve the Preston trigger, creating a token copy of Sister Hospitaller that is a 0/1 Illusion.
6. When the Sister Hospitaller token enters, it triggers, returning Sister Hospitaller from your graveyard to the battlefield.
7. Repeat from step 2.