Rex, Cyber-Hound, Pili-Pala, and Deathbloom Ritualist

Prerequisites

• Rex, Cyber-Hound on the battlefield
• Pili-Pala in exile
• Deathbloom Ritualist in exile
• You have at least two creature cards in your graveyard
• Rex does not have summoning sickness
• Deathbloom Ritualist and Pili-Pala exiled with a brain counter on them

Steps

1. Activate Rex using Deathbloom Ritualist's ability by tapping it, adding at least two mana of any color
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