Kilo, Apogee Mind, Agatha's Soul Cauldron, and Devoted Druid

Prerequisites

• Kilo, Apogee Mind on the battlefield
• Agatha's Soul Cauldron on the battlefield
• Devoted Druid in exile

Steps

1. Activate Kilo using Devoted Druid's first ability by tapping it, adding
2. Kilo triggers, causing you to proliferate and put a +1/+1 counter on Kilo
3. Activate Kilo using Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it
4. Repeat

Results

• Infinite green mana
• Infinite proliferate