Tempest is a legendary major card out of the New mechanic pool. Crescent Chain's finisher is a 250% full spin with 1.5 u knockback; every swing is 15% slower.

You can take it once · it only turns up when your Main ability can actually use it · it can be offered for 0 of the 34 abilities.

Only one card can reshape that ability this way — this one, or Crescent Wake and Quickblade. Take one and the rest are gone for the run.