How can you create a combo with Zedruu the Greathearted, Knowledge Pool, Colfenor's Plans?
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[START OF COMBO]This combo can be formed with Zedruu the Greathearted, Knowledge Pool, Colfenor's Plans

Color identity: WUBR
Mana cost: {U}{R}{W}
Steps:
  1. Activate Zedruu by paying {U}{R}{W}, giving control of Colfenor's Plans to an opponent.
  2. Whenever the opponent that controls Colfenor's Plans casts a spell from their hand, Knowledge Pool triggers, exiling that spell.
  3. Because Colfenor's Plans 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.[END OF COMBO STEPS]

Result:
  - Exile all spells cast from target opponent's hand
  - Target opponent can only cast one spell per turn
  - Target opponent skips their draw step[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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