If you were worried that the "100 Years Quest" would just be a slice-of-life tour of Guiltina, Episode 4 dispels those fears immediately. This episode pits Team Natsu against one of the most overpowered entities in the Fairy Tail universe: , the Water Dragon God.
Compared to the final season of the original Fairy Tail , 100 Years Quest Episode 4 shows a marked improvement in fluidity. The water physics—rendered in a mix of 2D and 3D CGI—are surprisingly seamless. Mercphobia’s design is intimidating; he looks like a cross between a traditional Chinese dragon and a deep-sea leviathan.