Rex, Cyber-Hound + Pili-Pala + Leafkin Druid

Prerequisites

• You control four or more creatures.
• Rex does not have summoning sickness.
• Leafkin Druid and Pili-Pala exiled with a brain counter on them.

Steps

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

Effects

• Infinite colored mana