Commandeer

[BigMac]

Just to be on the safe side.

Commandeer  (UU5) instant
You may remove two blue cards in your hand from the game rather than pay Commandeer's mana cost.
Gain control of target noncreature spell. You may choose new targets for it. (If that spell is an artifact or enchantment, the permanent comes into play under your control.)

Is it right when i assume when you commandeer a tendrils of agony, you only get the first spell and not the storm copies. My confusion is about the wordts:
"You may choose new TARGETS for it".

[49 Cents]

Yeah, you gain control of the spell, but since it is already cast (by your opponent), storm has already triggered. The wording is to make it able to steal Rack and Ruins and stuff.