Girtimuka

This Bug is present only on Celestia - Broken Sky and some previous versions of the Game. It have been fixed in Fantasia Heroes.

Girtimuka 2nd Skill Bug
Girtimuka is 5* dark mage. There is a bug with his second skill that makes his debuff per area rather than per entity. This bug is used by top players to achieve very high damage on multiple area bosses. (over 5 billion for dragon bosses) The bug is that Girtimuka 2nd skill "Breath of Darkness" decrease target defense by 20% per each area. So if the boss occupy all 6 tiles affected by the skill, Girtimuka 2nd skill with max charge will give 6*(5*20%) = 600% defense decrease on the affected boss. That makes the output damage be 700% of original damage. This skill combines specially well with Raven's and Ein's buffs because they are multiplied together. But Caesar's buff wont make very big damage boost because they are summed together.