Isochron Scepter, Shallow Grave, Corridor Monitor, and Ashnod's Altar

Prerequisites

• Isochron Scepter on the battlefield
• Shallow Grave in exile
• Corridor Monitor on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Corridor Monitor, adding
2. Activate Isochron Scepter by paying and tapping it, casting a copy of Shallow Grave without paying its mana cost
3. Resolve Shallow Grave, returning Corridor Monitor from your graveyard to the battlefield
4. Corridor Monitor enters the battlefield, untapping Isochron Scepter
5. Repeat

Results

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