Summoner

Target: Caster's Pet Power: X (128 at level 70) Casting: 3.0 seconds Recovery: 0.5 seconds Recast: 3 minutes Duration: 30.0 seconds

Effects: Allows caster to take control of target. This only works on your primary pet!

Also, beware: You, as your possessed pet, can be agro'd by enemies. But remember that you can target your pet to be invisible, instead of your own character, so invis won't break when you cast.