Miirym, Sentinel Wyrm + Bladewing the Risen + Yahenni, Undying Partisan

Miirym, Sentinel Wyrm

Bladewing the Risen

Yahenni, Undying Partisan

How it works

1. Cast Bladewing by paying 3.
2. When Bladewing enters the battlefield, it and Miirym trigger.
3. Resolve the Bladewing trigger, returning any Dragon from your graveyard to the battlefield.
4. Holding priority, activate Yahenni by sacrificing Bladewing.
5. Resolve the Miirym trigger, creating a nonlegendary token copy of Bladewing.
6. When the Bladewing token enters the battlefield, it triggers, returning Bladewing from your graveyard to the battlefield.
7. Repeat from step 2.
8. Resolve all Yahenni abilities.