Hmmmm... No way I could pick a single power... Too, too many awesome ones to pick from...
Certainly, a few of my favorites would be (in no particular order)
* T4 Judgement -- Now *that* was what a Blaster's "nuke" should have been from the get-go...
* Propel - slow, and unwieldy, but funnier than hell seeing the various items that would show up.
* Ninja Blade's Assassin Strike - Nothing like a katana (out of the blue) thru the gizzard ftw.
* Tesla Cage - Beautiful to behold, cheap and quick to cast, and would pretty much lock a baddie down
for an entire fight - with a hold proc in it, it could even leave a boss twitching uncontrollably. What's not to love?
Cheers,
4