Supernatural Stamina, Phyrexian Altar, and Returned Pastcaller

Prerequisites

• Supernatural Stamina in hand
• Phyrexian Altar on the battlefield
• Returned Pastcaller on the battlefield
• available

Steps

1. Cast Supernatural Stamina by paying , targeting Returned Pastcaller
2. Activate Phyrexian Altar by sacrificing Returned Pastcaller, adding
3. When Returned Pastcaller dies, it triggers, returning it from your graveyard to the battlefield
4. When Returned Pastcaller 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 magecraft triggers
• Infinite sacrifice triggers
• Infinite storm count