Did muramasa killed his master

Yes, according to Japanese legend, the sWordsmith Muramasa is said to have killed his master, which contributed to the belief that his sWords were cursed. Muramasa's blades were associated with violence and bloodshed, leading to the notion that they brought misfortune to their wielders. This story is part of the folklore surrounding Muramasa, highlighting the duality of beauty and danger in his craftsmanship. However, it's important to note that these tales are more myth than historical fact.