Sidisi, Regent of the Mire, Bladewing the Risen, Thornbite Staff, and Bloodthrone Vampire

Prerequisites

• Sidisi, Regent of the Mire on the battlefield
• Bladewing the Risen in the graveyard
• Thornbite Staff on the battlefield
• Bloodthrone Vampire on the battlefield

Steps

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 Bloodthrone Vampire by sacrificing Bladewing
6. When Bladewing dies, Sidisi triggers, untapping Sidisi
7. Resolve the Bloodthrone Vampire ability
8. Repeat

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinitely large creature until end of turn