Cathodion + Dross Scorpion + Prototype Portal + Yahenni, Undying Partisan

Mana needed: {3}

B identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Prototype Portal by paying {3} and tapping it, creating a token copy of Cathodion.
  2. Activate Yahenni by sacrificing Cathodion.
  3. When Cathodion dies, Cathodion and Dross Scorpion trigger.
  4. Resolve the Cathodion trigger, adding {C}{C}{C}.
  5. Resolve the Dross Scorpion trigger, untapping Prototype Portal.
  6. Resolve the Yahenni ability, giving it indestructible until end of turn.
  7. Repeat.

What the combo produces