Eternal Witness, Phyrexian Altar, and Supernatural Stamina

Prerequisites

• Eternal Witness on the battlefield
• Phyrexian Altar on the battlefield
• Supernatural Stamina in hand
• available

Steps

1. Cast Supernatural Stamina by paying , giving Eternal Witness +2/+0 and a new triggered ability until end of turn
2. Activate Phyrexian Altar by sacrificing Eternal Witness, adding
3. When Eternal Witness dies, it triggers its own ability from Supernatural Stamina, returning Eternal Witness from your graveyard to the battlefield tapped
4. When Eternal Witness enters the battlefield, it triggers, returning Supernatural Stamina from your graveyard to your hand
5. Repeat

Results

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