Dryad Ω is an enemy in Lightning Returns: Final Fantasy XIII. It is a Last One that appears when there is only one Dryad left in the game, after killing 100 of their species. The player needs to complete the Moogle Village quest where Lightning fights groups of Dryads before the Last One will appear.
[view·edit·purge]A dryad is a tree nymph, that is a female spirit of a tree, in Greek mythology. In Greek drys signifies "oak". Thus, dryads are specifically the nymphs of oak trees, though the term has come to be used for all tree nymphs in general.