Nullify

Enchanted creature cannot use activated abilities.

"The way the spell works is relatively simple. It
attaches itself to the targets skin, causing the limbs to
go intensely numb at the presence at the presence of
magic power. Keep in mind that particularly strong
magic users may still be able to cast regardless of the
effects of the spell, but the intense burning pain that
follows casting will greatly hinder their magical
potency." - Hyrule Compendium