Hyshana, Joyful Killer is the main boss in the Festival of Souls raid event. It has 15 different levels, each increasing in HP from 100 to 62,000. Players have the normal 2 hour time limit to kill it before the boss disappears.
Quotes: "Whahahahah! Come, let us shred each other to pieces!"
"Hurt or be hurt? I can't decide which is more enjoyable!"