Ashnod's Altar + Corridor Monitor + Isochron Scepter + Shallow Grave

UB identity

Commander legal

The 4 combo pieces

• Ashnod's Altar
• Corridor Monitor
• Isochron Scepter
• Shallow Grave

How to execute it

1. Activate Ashnod's Altar by sacrificing Corridor Monitor, adding {C}{C}.
2. Activate Isochron Scepter by paying {2} 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.

What the combo produces

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