Enchant creature
Enchanted creature can't attack or block unless its controller pays {3}.
Activated abilities of enchanted creature cost {3} more to activate.
Activated abilities are written in the form “Cost: Effect.” Some keywords are activated abilities and will have colons in their reminder texts. Static and triggered abilities are unaffected by Oppressive Rays.
The enchanted creature's controller can choose to not attack or block with it even if it must attack or block if able. Players can't be forced to pay a cost to attack or block.