So today is the day the Vortex Arena: Electric Showdown is supposed to begin in Brave Frontier. Unfortunately, the game is suffering from some connection issues which is preventing players from logging in.
In an update on Facebook, developer Gumi Asia acknowledged the issues, assuring that their team is working on a fix. There's no expected time window for when the game will be back up, but Gumi promises to update us as soon as they can.
The good news is that when Brave Frontier does come back up, you'll be able to partake in the Electric Showdown, a special arena that allows players to compete against one another using only Thunder units — similar to the recent Inferno Showdown. If you reach the "Worship Rank," you'll unlock Storm Wing Cerise.