Kinnan, Bonder Prodigy + Basalt Monolith

Kinnan, Bonder Prodigy
Basalt Monolith

Requires
All permanents on the battlefield.
Steps
  1. Activate Basalt Monolith's first ability by tapping it, adding 4
  2. Activate Basalt Monolith's last ability by paying 3, untapping it
  3. Repeat
Results
Infinite colorless mana.