Rex, Cyber-Hound, Pili-Pala, and Bloom Tender

Prerequisites

• Rex, Cyber-Hound on the battlefield
• Pili-Pala in exile
• Bloom Tender in exile
• Rex does not have summoning sickness
• Bloom Tender and Pili-Pala exiled with a brain counter on them

Steps

1. Activate Rex using Bloom Tender'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
• Infinite mana of colors among permanents you control