Gemstone Array + Mana Echoes + Propagator Drone

Mana needed: {5}{2/G}{2/G}{2/G} at most

RG identity

Commander legal

The 3 combo pieces

How to execute it

  1. Activate Propagator Drone by paying {3}{G}, creating a 0/1 Eldrazi Spawn creature token.
  2. When the Eldrazi Spawn enters, Mana Echoes triggers, adding {C} for each Eldrazi and Spawn you control.
  3. If needed, activate Gemstone Array's first ability by paying {2}, putting a charge counter on it. Then, activate Gemstone Array's second ability by removing a charge counter from it, adding {G}.
  4. Repeat.

What the combo produces