Rex, Cyber-Hound, and Pili-Pala

Prerequisites

• Rex, Cyber-Hound on the battlefield
• Pili-Pala in exile
• Rex does not have summoning sickness

Steps

1. Activate Rex using the ability from the creature that can tap for multiple mana by tapping Rex, 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