I believe you can consider our 1 hr, 2hr ability to be our limit breaks to be coming. You build them up and then release them for awesomeness - the longer build ups making higher tier awesome.

I believe it was a build up at least.. and some relation to parties (like in that one trailer everyone helped the BLM call down a meteor), though I dont know if it was said if you can or can't do one by your self.