Kurkesh, Onakke Ancient, Basalt Monolith, and Chromatic Orrery

Prerequisites

• Kurkesh, Onakke Ancient on the battlefield
• Basalt Monolith on the battlefield
• Chromatic Orrery on the battlefield
• available

Steps

1. Activate Basalt Monolith's first ability by tapping it, adding
2. Activate Basalt Monolith's last ability by paying
3. Kurkesh triggers, causing you to pay to copy Basalt Monolith's last ability
4. Resolve the copy of Basalt Monolith's last ability, untapping it
5. Activate Basalt Monolith's first ability by tapping it, adding
6. Resolve the Basalt Monolith ability from step 2, untapping it
7. Repeat

Results

• Infinite colored mana
• Infinite colorless mana