Helm of Obedience, and Rest in Peace

Prerequisites

• Helm of Obedience on the battlefield
• Rest in Peace on the battlefield
• available

Steps

1. Activate Helm of Obedience by paying and tapping it, causing target opponent to mill a card
2. Due to Rest in Peace's replacement effect, the milled card is exiled instead of going to the graveyard, and that opponents repeats that process until their library is empty

Results

• Exile target opponent's library