Incubation Druid + Pili-Pala + Rex, Cyber-Hound

GWU identity

Commander legal

The 3 combo pieces

What must be in place

Rex does not have summoning sickness and has a +1/+1 counter on it.
You control a mana-producing land.
Incubation Druid and Pili-Pala exiled with a brain counter on them.

How to execute it

  1. Activate Rex using Incubation Druid's ability by tapping it, adding three mana of any type a land you control could produce.
  2. Activate Rex using Pili-Pala's ability by paying {2} and untapping it, adding one mana of any color.
  3. Repeat.

What the combo produces