Improvements

"... Will he be fine?" Larisa asked.

"While this is a large concentration of energy left by the dragons, right now, it is natural energy, it has no corrupt power in it," Sakaki explained. "He is only having a hard time because he is sending enough mana that fills his mana pool instantly."

As Rain absorbed the energy, the volcano began to cool down as well and the lava was hardening and getting darker. Using just a bit of this mana to break the limits of several skills was easy and almost necessary to keep his body well and so he did that.

You broke the level cap of the skill Frost Throne. 

You broke the level cap of the skill Frostbite. 

You broke the level cap of the skill Glacial Monarch. 

…

The skill Slimes' Dungeon Creation leveled up.

…

You learned a new skill.