Necrotic Ooze + Barrenton Medic + Channeler Initiate

Prerequisites

• Necrotic Ooze does not have summoning sickness.

Steps

1. 1Activate Necrotic Ooze using Barrenton Medic's second ability by putting a -1/-1 counter on it, untapping it.
2. 2Activate Necrotic Ooze using Channeler Initiate's ability by tapping it and removing a -1/-1 counter from it, adding one mana of any color.
3. 3Repeat.

Effects

• Infinite colored mana