Crystalline Crawler + Doubling Season + Phyrexian Altar + and 2 others

Mana needed: {1}{R}

GUR identity

Commander legal

The 5 combo pieces

How to execute it

  1. Activate Phyrexian Altar by sacrificing Squee, adding {R}.
  2. Cast Squee from your graveyard by paying {1}{R}{R}.
  3. The Thirteenth Doctor's first ability triggers, putting two +1/+1 counters on Crystalline Crawler.
  4. Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding {1}{R}.
  5. Repeat.

What the combo produces