Knowledge Pool + Moderation + Fractured Identity

Knowledge Pool

Moderation

Fractured Identity

How it works

1. Cast Fractured Identity by paying 3, exiling Moderation and causing each opponent to create a token copy of it.
2. Cast Knowledge Pool by paying 6.
3. Whenever an opponent casts a spell from their hand, Knowledge Pool triggers, exiling that spell.
4. 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.