the front side of Arcane Laboratory
the back of a classic MtG card
the front side of Knowledge Pool
the back of a classic MtG card

Color Identity: U

Initial Card State

  1.  Arcane Laboratory and Knowledge Pool on the battlefield.

Steps

  1. Whenever a player casts a spell from their hand, Knowledge Pool triggers, exiling that spell.
  2. Because Arcane Laboratory 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

  1. Players can only cast one spell per turn.
  2. Exile all spells players cast from their hand.

Metadata

  1. This combo produces a lock.
  2. In 890 decks according to EDHREC.
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