Matter Reshaper, Phyrexian Altar, and Haunted Crossroads

Prerequisites

• Matter Reshaper on the battlefield
• Phyrexian Altar on the battlefield
• Haunted Crossroads on the battlefield

Steps

1. Sacrifice Matter Reshaper to Phyrexian Altar, adding
2. With Matter Reshaper's trigger on the stack, activate Haunted Crossroads by paying , putting Matter Reshaper from your graveyard on top of your library
3. Resolve Matter Reshaper's trigger, revealing Matter Reshaper on top of your library, and putting it on the battlefield
4. Repeat

Results

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