Carrion Feeder + Crystalline Crawler + Gravecrawler + The Thirteenth Doctor

Mana needed: {B}

BGU identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Carrion Feeder by sacrificing Gravecrawler, putting a +1/+1 counter on Carrion Feeder.
  2. Cast Gravecrawler from your graveyard by paying {B}.
  3. The Thirteenth Doctor's first ability triggers, putting a +1/+1 counter on Crystalline Crawler.
  4. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {B}.
  5. Repeat.

What the combo produces