It clearly is meant to have some pvp application with the stun being a possible proc, I test it a bit and it is utterly worthless because the stacks fall off in THREE seconds meaning that if you do anything like uh, defend yourself or if the other guy makes any effort at all to not let you just hit him with light attacks for like 15 seconds it's never going off (if they roll it's gone) (if they Los it's gone) even with purely just light attack spamming somebody trying to get it to activate I could not get this to work once in a deathmatch. Even in PvE I can't see any way this will be good, there is other stuff going on it needs to either go off in three stacks the cap of per second needs to be gone or the stacks need to last for 10 seconds or this just can't be used let alone effectively.