Before skill revamp, it used to remove the last buff of the player your fighting. Now days I'm not sure.
Still the same. Some hybs use it in PK to remove for example the FWD buff of the opponent. But this can be easily avoided by using some unecessary buffs last
currently, my hybrid is too low to check the skill/scenario, BUT ... I thought the skill works on some bosses. For example Queen in Icy; the skill (I thought) removes her (HP & VE) leach-blocking skill. Am I completely out-to-lunch on that ?