Ancient Greenwarden + Avenger of Zendikar + Crystalline Crawler + and 2 others

Mana needed: {1}{G}

GU identity

Commander legal

The 5 combo pieces

What must be in place

Fertilid has at least one +1/+1 counter on it.
"Plant" chosen with Xenograft.

How to execute it

  1. Activate Fertilid by paying {1}{G} and removing a +1/+1 counter from it, causing you to search your library for a basic land card and put it onto the battlefield tapped.
  2. When the land enters the battlefield, Avenger of Zendikar's second ability triggers twice, putting two +1/+1 counters on each creature you control.
  3. Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding {1}{G}.
  4. Repeat.

What the combo produces