Dross Scorpion + Myr Moonvessel + Prototype Portal + Yahenni, Undying Partisan

Mana needed: {1}

B identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Prototype Portal by paying {1} and tapping it, creating a token copy of Myr Moonvessel.
  2. Activate Yahenni by sacrificing Myr Moonvessel.
  3. When Myr Moonvessel dies, Myr Moonvessel and Dross Scorpion trigger.
  4. Resolve the Myr Moonvessel trigger, adding {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