Ashnod's Altar + Crystalline Crawler + Nim Deathmantle + Roalesk, Apex Hybrid

GU identity

Commander legal

The 4 combo pieces

What must be in place

A counter on Crystalline Crawler.

How to execute it

  1. Sacrifice Roalesk to Ashnod's Altar generating two colorless, with Roalesk's death you proliferate twice, putting two more counters on Crystalline Crawler.
  2. Remove those counters for two mana, use the other two mana from Ashnod's to return Roalesk to the battlefield using Nim Deathmantle.
  3. Repeat.

What the combo produces