Ashnod's Altar + Corridor Monitor + Lithoform Engine + Smile at Death

WU identity

Commander legal

The 4 combo pieces

• Ashnod's Altar
• Corridor Monitor
• Lithoform Engine
• Smile at Death

How to execute it

1. At the beginning of your upkeep, Smile at Death triggers.
2. Holding priority, activate Ashnod's Altar by sacrificing Corridor Monitor, adding {C}{C}.
3. Activate Lithoform Engine's first ability by paying {2} and tapping it, copying Smile at Death's trigger.
4. Resolve the copy of Smile at Death's trigger, returning Corridor Monitor from your graveyard to the battlefield.
5. When Corridor Monitor enters the battlefield, it triggers, untapping Lithoform Engine.
6. Repeat from step 2.

What the combo produces

• Infinite colorless mana
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite recursion of some creature cards in your graveyard
• Infinite sacrifice triggers