Grima Wormtongue

When Grima Wormtongue enters the battlefield
put an Irritation Counter on target creature.
(Target creature gets -1/-1 for every Irritation
Counter on it and its abilities can't be activated.)
{2}{u}{b}: Put an Irritation Counter on target
creature.
When Grima Wormtongue leaves the battlefield, remove all Irritation Counters.