Basalt Monolith, Sydri, Galvanic Genius, and Agatha of the Vile Cauldron

Prerequisites

• Basalt Monolith on the battlefield
• Sydri, Galvanic Genius on the battlefield
• Agatha of the Vile Cauldron on the battlefield
• undefined available

Steps

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

Results

• Infinite colorless mana