Leshy

A malevolent forest spirit: A "Leshy" can sometimes be portrayed as a mischievous and even treacherous trickster, and coupling it with "Diablo" could emphasize this darker, more demonic nature.

A "Devil of the Forest": Some interpretations of Slavic lore consider the Leshy a temperamental, powerful being who presides over the wilderness, which, combined with the Spanish term for devil, would denote an evil or dangerous ruler of the woods.