Instructions
Destroy the gun as soon as you can in order to make the rest of the battle easier. The gun has three attacks: acid, ice and flame. Use long-ranged weapons to attack the gun and destroy it.
Use magic or flying attacks to destroy the large hand. The hand only has one attack, but if you touch it, you can be damaged, so be careful. It is difficult to attack the hand using normal attacks, so magic is your best bet when it comes to the hand.
Attack the five pillars by hitting them when they rise up. Each of the four outer pillars shoots an electricity ball when it pops up, so watch out for that. The central pillar coats the entire floor with electricity when it rises up, but if you damage it before it attacks, the attack will not go through. Destroy all five pillars to defeat the boss.