In Ymirs Pass you can get a quest where you are supposed to catch a rabbit named "Buck", you get an item in your inventory which is a rabbit trap. The thing about the trap is that you can spawn liek 30 of them at a time, and theres no zone limitaion, you can use them where ever you want.
Now, if you are a ToS you can pop alot of these traps and cast your Storm Crown and the Storm Crown dmg will pulse out of these traps just as if they were group members etc.
Kinda sweet to fill up a mini game and nuke everyone with rabbit traps enhanced with Storm Crown^^,