From Guild Wars 2 Wiki
- Cannot be used without a valid targeted enemy.
- The effect will end prematurely if a shout is used, the pet is given an order, the pet falls in battle, or the pet's target becomes invisible or defeated.
- Prior to the April 30, 2013 patch, this was incorrectly spelled as Sick 'Em. Sick 'em is an incorrect spelling of sic 'em. To sic means to set upon, or to incite an attack.