Jackdaw Savior, Loyal Retainers, and Bloodthrone Vampire

Prerequisites

• Jackdaw Savior on the battlefield
• Loyal Retainers in the graveyard
• Bloodthrone Vampire on the battlefield

Steps

1. During your precombat main phase, activate Bloodthrone Vampire by sacrificing the legendary creature with flying
2. When the creature dies, Jackdaw Savior triggers, returning Loyal Retainers from your graveyard to the battlefield
3. Resolve the Bloodthrone Vampire ability Activate Loyal Retainers by sacrificing it, returning the legendary creature with flying from your graveyard to the battlefield
4. Repeat

Results

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