Sidisi, Regent of the Mire + Bladewing the Risen + Thornbite Staff + Yahenni, Undying Partisan

Sidisi, Regent of the Mire

Bladewing the Risen

Thornbite Staff

Yahenni, Undying Partisan

How it works

1. Activate Sidisi by tapping it and sacrificing a nontoken Dragon with mana value 6.
2. When the creature dies, Sidisi triggers, untapping Sidisi.
3. Resolve the Sidisi ability, returning Bladewing from your graveyard to the battlefield.
4. When Bladewing enters the battlefield, it triggers, returning the Dragon with mana value 6 from your graveyard to the battlefield.
5. Activate Yahenni by sacrificing Bladewing.
6. When Bladewing dies, Sidisi triggers, untapping Sidisi.
7. Resolve the Yahenni ability.
8. Repeat.