Perfected Procedure

Forecast — {2}{w/u}{w/u}, Reveal Perfected Procedure from your hand: Detain target creature you don't control.
(Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.) (Activate this ability only during your upkeep and only once each turn.)
Exile all detained creatures.
Addendum — If you cast this spell during your main phase, draw a card for each permanent exiled by Perfected Procedure.