Riverchurn Monument, and Jidoor, Aristocratic Capital // Overture

Prerequisites

• Riverchurn Monument on the battlefield
• Jidoor, Aristocratic Capital // Overture in hand
• available

Steps

1. Cast Overture by paying , causing each opponent to mill half their library, rounded down
2. Activate Riverchurn Monument's exhaust ability by paying and tapping it, causing each opponent to mill the remainder of their library

Results

• Infinite mill for target opponent