The Master, Formed Anew, Cavalier of Night, and Bloodthrone Vampire

Prerequisites

• The Master, Formed Anew on the battlefield
• Cavalier of Night in exile
• Bloodthrone Vampire on the battlefield
• available

Steps

1. Activate Bloodthrone Vampire by sacrificing The Master
2. When The Master dies, its second ability triggers, returning itself from your graveyard to the battlefield as a copy of Cavalier of Night
3. Resolve the Bloodthrone Vampire ability When The Master enters the battlefield, its first ability triggers, doing nothing
4. Repeat

Results

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