Basalt Monolith, Sydri, Galvanic Genius, and Training Grounds

Prerequisites

• Basalt Monolith on the battlefield
• Sydri, Galvanic Genius on the battlefield
• Training Grounds on the battlefield
• Basalt Monolith does not have summoning sickness
• available

Steps

1. Activate Sydri's first ability by paying , making Basalt Monolith 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 last ability by paying , untapping it
4. Repeat

Results

• Infinite colorless mana