Teferi, Mage of Zhalfir, and Knowledge Pool

Prerequisites

• Teferi, Mage of Zhalfir on the battlefield
• Knowledge Pool on the battlefield

Steps

1. Because of Teferi, opponent can only cast spells whenever they could cast a sorcery
2. Whenever they cast a spell from their hand, Knowledge Pool triggers, exiling that spell
3. The opponent cannot cast the spell as permitted by Knowledge Pool due to Teferi

Results

• Exile all spells cast by your opponents from their hand