Crystalline Crawler + Fain, the Broker + Gravecrawler + Thornbite Staff

B identity

Commander legal

The 4 combo pieces

What must be in place

Thornbite Staff attached to Fain.
Fain does not have summoning sickness.
You control at least one additional Zombie.

How to execute it

  1. Activate Fain's first ability by tapping it and sacrificing Gravecrawler.
  2. Gravecrawler dies, triggering Fain, untapping it.
  3. Resolve the Fain ability from step 1, putting two +1/+1 counters on Crystalline Crawler.
  4. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {B}.
  5. Cast Gravecrawler from your graveyard by paying {B}.
  6. Repeat.
  7. Once you have infinite mana and counters, you may instead activate Fain's other abilities.

What the combo produces