Shadowmage: The Hunter’s RevengeEpisode 37

To the kingdom, Valen is nothing but a pathetic drunk— who failed to protect his murdered wife. They have no idea this broken beggar is actually the "Shadow," the realm's legendary, absolute master of dark magic. But when Valen discovers the truth—that his own brother orchestrated his wife's murder—the masquerade ends. Dropping his bottle, the "weak" drunk awakens his apocalyptic Shadow Domain. He ruthlessly executes his treacherous brother and single-handedly annihilates a city-destroying beast tide, forcing the terrified elites to witness true, god-like power!