I love this Epic Moment. The Buddhist-styled naming is fine, but doesn't fit the Grandmaster of Flowers naming motifs on other abilities, like Lily Petals.
Haven't you watched "The Last Starfighter?" The name of this Moment BEGS to be called:
**DEATH BLOSSOM**.
It's exactly as the movie's weapon. Kills all in a specific range. Can't be used very readily, so it's more of a last-ditch/emergency weapon.
While I can't find any trademarks on the term, perhaps its used in other games. But then, so is "Firewall."