Eternal Witness, Phyrexian Altar, and Helping Hand

Prerequisites

• Eternal Witness on the battlefield
• Phyrexian Altar on the battlefield
• Helping Hand in hand

Steps

1. Sacrifice Eternal Witness to Phyrexian Altar, adding
2. Cast Helping Hand, returning Eternal Witness from your graveyard to the battlefield
3. Eternal Witness enters, returning Helping Hand from your graveyard to your hand
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Infinite magecraft triggers