Orah, Skyclave Hierophant, Doomed Necromancer, Lightning Greaves, and Phyrexian Altar

Prerequisites

• Orah, Skyclave Hierophant on the battlefield
• Doomed Necromancer in the graveyard
• Lightning Greaves on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Orah, adding
2. Orah dies, returning Doomed Necromancer to the battlefield
3. Activate Lightning Greaves' equip ability by paying , attaching it to Dopomed Necromancer
4. Activate Doomed Necromancer by paying tapping, and sacrificing it, returning Orah to the battlefield
5. Repeat

Results

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