Ashnod the Uncaring, Apprentice Necromancer, and Phyrexian Altar

Prerequisites

• Ashnod the Uncaring on the battlefield
• Apprentice Necromancer on the battlefield
• Phyrexian Altar on the battlefield
• You control another nontoken creature
• Apprentice Necromancer does not have summoning sickness

Steps

1. Activate Phyrexian Altar by sacrificing another nontoken creature, adding
2. Activate Apprentice Necromancer by paying , tapping and sacrificing it, targeting any creature card in your graveyard
3. Ashnod triggers, copying Apprentice Necromancer's ability, targeting Apprentice Necromancer
4. Resolve both Apprentice Necromancer abilities, returning Apprentice Necromancer and another creature from your graveyard to the battlefield, and giving them haste until end of turn
5. Repeat

Results

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