Dross Scorpion + Phyrexian Altar + Prototype Portal + Su-Chi

Mana needed: {4}

C identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Prototype Portal by paying {4} and tapping it, creating a token copy of Su-Chi.
  2. Activate Phyrexian Altar by sacrificing Su-Chi, adding one mana of any color.
  3. When Su-Chi dies, it and Dross Scorpion trigger.
  4. Resolve the Su-Chi trigger, adding {C}{C}{C}{C}.
  5. Resolve the Dross Scorpion trigger, untapping Prototype Portal.
  6. Repeat.

What the combo produces