Agatha of the Vile Cauldron + Basalt Monolith + Tough Cookie

Mana needed: {1}{G} at most

RG identity

Commander legal

The 3 combo pieces

• Agatha of the Vile Cauldron
• Basalt Monolith
• Tough Cookie

What must be in place

Basalt Monolith does not have summoning sickness.
Agatha of the Vile Cauldron has power 1 or greater.

How to execute it

1. Activate Tough Cookie's first ability by paying at most {1}{G}, causing Basalt Monolith to become a 4/4 artifact creature until end of turn.
2. Activate Basalt Monolith's first ability by tapping it, adding {C}{C}{C}.
3. activate Basalt Monolith's second ability by paying at most {2}, untapping it.
4. Repeat from step 2.

What the combo produces

• Infinite colorless mana