Metalworker + Pili-Pala + Rex, Cyber-Hound

WU identity

Commander legal

The 3 combo pieces

What must be in place

You have at least one artifact card in hand.
Rex does not have summoning sickness.
Metalworker and Pili-Pala exiled with a brain counter on them.

How to execute it

  1. Activate Rex using Metalworker's ability by tapping it, revealing an artifact card from your hand and adding {C}{C}.
  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