River Styx is the mission to find the event enemy named Hannya which is a Shy Boy with a creepy mask which has become a demon. The map is quite long but he has nearly the same range as Sunfish Jones and damage that nearly O.H.Ks any of the Basics, Specials and Crazed except for high level Jameira and Islands. The supporting enemies are what makes this a challenge though as they are easy pushers, especially the R. Ost which can easily wreck havoc on your units damaging Hannya. This is pretty much an endurance battle where a mistake can lead to disaster and tragedy.
Strategy
As of completing this stage, the ideal meathod is to either 1. Time your A. Bahamut cat and kill the R. Ost, and the Bore with your islands, after that just rinse and repeat the strategy. Cat Combos can be used, but if you use cat combos, you better to hope you have good timing.2, is to simply tank the hits and the ongoing enemies coming at you, as of you are gonna do this, you're gonna need to use cat combos, and pretty high level cats.
Trivia
The enemy's base HP is composed by two "666", believed to be the "Number of the Beast".
The River Styx is a river from Greek Mythology which makes the boundary between the Earth and the Underworld. Source and more info.
