森滅ぼしの最長老

"森滅ぼしの最長老" is not a term or title from any known traditional or contemporary Japanese culture, mythology, or literature. The phrase itself is not grammatically correct in Japanese, and the individual words do not have a specific meaning that would make sense in a title or description.

If you're looking for information on a specific character, elder, or figure from Japanese folklore, history, or literature, please provide more details or context so that I can provide accurate information. If you're interested in Japanese mythology or folklore, there are many fascinating characters and stories, such as the gods and goddesses from the Shinto religion, the various yokai (supernatural beings), and historical figures.