Knowledge Pool, and Eidolon of Rhetoric

Prerequisites

• Knowledge Pool on the battlefield
• Eidolon of Rhetoric on the battlefield

Steps

1. Whenever a player casts a spell from their hand, Knowledge Pool triggers, exiling that spell
2. Because Eidolon of Rhetoric prevents players from casting more than one spell each turn, players cannot cast the spell permitted by Knowledge Pool, or any other spell that turn

Results

• Exile all spells cast from a player's hand
• Players can only cast one spell per turn