Reassembling Skeleton, Phyrexian Altar, and Pawn of Ulamog

Prerequisites

• Reassembling Skeleton on the battlefield
• Phyrexian Altar on the battlefield
• Pawn of Ulamog on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Reassembling Skeleton, adding Pawn of Ulamog triggers, creating a 0/1 Eldrazi Spawn creature token with "Sacrifice this creature: add " Activate the Eldrazi Spawn by sacrificing it, adding
2. Activate Reassembling Skeleton by paying , returning it from your graveyard to the battlefield tapped
3. Repeat

Results

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