The Art of Being a Water Terror

The water lock outside my cave is teeming with elementals that the vrykul magi have yet to tame. I am going to teach you a trick for possessing these creatures for a short time, and you will use them to wreak havoc upon Jotunheim! <The banshee-infested vrykul draws magic in the air and touches a large finger to your forehead.> Go now and open the gate to the lock. A water terror will rush out and you will possess it to destroy our enemies!

Jotunheim vrykul slain while possessing a Water Terror