Rex, Cyber-Hound, Pili-Pala, and Gyre Sage

Prerequisites

• Rex, Cyber-Hound on the battlefield
• Pili-Pala in exile
• Gyre Sage in exile
• Rex does not have summoning sickness and has at least two +1/+1 counters on it
• Gyre Sage and Pili-Pala exiled with a brain counter on them

Steps

1. Activate Rex using Gyre Sage's ability by tapping it, adding at least
2. Activate Rex using Pili-Pala's ability by paying and untapping it, adding one mana of any color
3. Repeat

Results

• Infinite colored mana