Pitiless Plunderer, Reassembling Skeleton, The Masamune, and Yahenni, Undying Partisan

Prerequisites

• Pitiless Plunderer on the battlefield
• Reassembling Skeleton on the battlefield
• The Masamune on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Yahenni by sacrificing Reassembling Skeleton
2. When Reassembling Skeleton dies, Pitiless Plunderer triggers twice, creating two Treasure tokens
3. Resolve the Yahenni ability
4. Activate the Treasure tokens by tapping and sacrificing them, adding
5. Activate Reassembling Skeleton by paying , returning it from your graveyard to the battlefield tapped
6. Repeat

Results

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