Radiant Ascension is a legendary major card out of the New mechanic pool. Ascendant Form pulses 6 times over 1.5 s on entry, burning 40 radiance in 6 u each pulse; the heal is 2% per pulse and the buff 25% shorter.

You can take it once · it only turns up when your Ultimate 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 Avatar and Enduring Ascension. Take one and the rest are gone for the run.