Basalt Monolith + Katsumasa, the Animator + Training Grounds

Prerequisites

• Basalt Monolith does not have summoning sickness.

Steps

1. 1Activate Katsumasa by paying , causing Basalt Monolith to become an artifact creature until end of turn.
2. 2Activate Basalt Monolith's first ability by tapping it, adding .
3. 3Activate Basalt Monolith's last ability by paying , untapping it.
4. 4Repeat from step 2.

Effects

• Infinite colorless mana