Beelzebub is a Demon MvP in Bossnia [Lv:3].
At first, he takes his fly form, which is of a Steel Chonchon.
At 50% HP, he will try to transform into his true form, unless you can kill him quickly beforehand. When he changes forms his HP will be completely restored, giving him 10m HP.
CardMain article: Berzebub Card
Name: Berzebub Card
Description: Reduce Casting Time by 30%.
Compounded On: Accessory
Drop Rate: 10.00%