Ashnod's Altar + Gemstone Array + Gravecrawler

B identity

Commander legal

The 3 combo pieces

What must be in place

You control an additional Zombie.

How to execute it

  1. Activate Ashnod's Altar by sacrificing Gravecrawler, adding {C}{C}.
  2. Activate Gemstone Array's first ability by paying {2}, putting a charge counter on it.
  3. Activate Gemstone Array's second ability by removing a charge counter from it, adding {B}.
  4. Cast Gravecrawler from your graveyard by paying {B}.
  5. Repeat.

What the combo produces