Zedruu the Greathearted, Knowledge Pool, and Moderation

Prerequisites

• Zedruu the Greathearted on the battlefield
• Knowledge Pool on the battlefield
• Moderation on the battlefield
• available

Steps

1. Activate Zedruu by paying , giving control of Moderation to an opponent
2. Whenever the opponent that controls Moderation casts a spell from their hand, Knowledge Pool triggers, exiling that spell
3. Because Moderation prevents the opponent from casting more than one spell each turn, the opponent cannot cast the spell permitted by Knowledge Pool, or any other spell that turn

Results

• Exile all spells cast from target opponent's hand
• Target opponent can only cast one spell per turn