Fast paced power ups
Halfway through the 10th floor of [Waterworks], [Volcanic Eruption] and [Rage of the Thunder Monarch] finally hit 100, and I was able to put the two skills in the [Skill Combination] tab that shone blue.
The product of these two was the rank S+ skill, [Devastation- The sky cracks as destructive lightning and flames from the depths of an unknown dimension search for your enemies.]
The first trial of this skill was particularly eye opening. The moment it was casted, it seemed like the sky was unzipped as roiling thick ropes of purple lightning and red flames spread out to every single [Winged Shark] in the air, as well as the ones hidden below in the water.