Lord Xander, the Collector, and Bruvac the Grandiloquent

Prerequisites

• Lord Xander, the Collector on the battlefield
• Bruvac the Grandiloquent on the battlefield
• Lord Xander does not have summoning sickness
• An opponent has an even library size

Steps

1. Declare Lord Xander as an attacker, attacking any opponent with an even library size
2. Lord Xander's second ability triggers, causing the opponent to mill their entire library

Results

• Infinite mill for target opponent