Roxanne, Starfall Savant, Basalt Monolith, and Saheeli's Artistry

Prerequisites

• Roxanne, Starfall Savant on the battlefield
• Basalt Monolith on the battlefield
• Saheeli's Artistry in hand
• available

Steps

1. Cast Saheeli's Artistry by paying , creating a token copy of Basalt Monolith
2. Activate the token Basalt Monolith's first ability by tapping it, adding
3. Roxanne's second ability triggers, adding
4. Activate the token Basalt Monolith's second ability by paying , untapping it
5. Repeat from step 2

Results

• Infinite colorless mana