Valter is a dangerous unit with some impressive skills. At 5★ he wields the exclusive Cursed Lance, which boosts his stats and quickens his cooldown timer at the cost of 4 HP after each combat. He also comes armed with Luna, Darting Blow, and Panic Ploy.
Like most recent GHBs, you can fight Valter on Hard, Lunatic, and Infernal difficulty. His map is based on Scorched Sand, Chapter 15 from TSS.
Valter’s Grand Hero Battle will be available until 29 August at 6:59am UTC.