This seems like something that should have an easy answer, but I can’t find it…
Suppose Tachyon has Unrelenting Momentum in play.
Action 1: She sprints, gaining a free Nimble Strike.
Action 2: She sprints again.
Unrelenting Momentum now grants Tachyon a free sprint. Also, Accelerated Assault grants her a free Nimble Strike. Do I have to choose? Or does she take both actions immediately on gaining them?
Here’s a variation that really boils down to a second question:
Action 1: Tachyon sprints, gaining a free Nimble Strike.
Action 2: She sprints again, this time not taking the free attack, but Unrelenting Momentum grants her a free sprint. She sprints, and this time DOES take the free Nimble Strike. Does Unrelenting Momentum now grant her a free Nimble Strike? In more general terms, does Unrelenting Momentum apply multiple times per turn?