Oppressive Rays | Magic: The Gathering
Formats Oppressive Rays is Legal in
Official Oracle Text for Oppressive Rays
Enchanted creature can't attack or block unless its controller pays .
Activated abilities of enchanted creature cost more to activate.
Official Rulings for Oppressive Rays
4/26/2014 : Activated abilities are written in the form “Cost: Effect.” Abilities that don’t have a cost and effect separated by a colon are unaffected.