Avacyn's Collar, Ashnod's Altar, and Xenograft

Prerequisites

• Avacyn's Collar on the battlefield
• Ashnod's Altar on the battlefield
• Xenograft on the battlefield
• Avacyn's Collar attached to any creature you control
• "Human" chosen with Xenograft

Steps

1. Activate Ashnod's Altar by sacrificing the creature with Avacyn's Collar attached, adding
2. When the creature dies, Avacyn's Collar triggers, creating a 1/1 Spirit creature token
3. Activate Avacyn's Collar's equip ability by paying , attaching it to the Spirit token
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers