Kinda hot female halloween costume ideas?

ok so im a teenager so i dont want anything too y and slutty but id like to look hot for my boyfriend hahaha anyway i can sew so i was thinking of making something, i have this nice mesh material with gold flecks in it and i was thinking of making some sort of dress maybe with a corset to add some y and keep me from having to make much of a top. i'd prolly add some sleeves to the corset with the mesh and some kind of skirt. anyway so considering what ideas i have, what should my costume theme be? i thought of maybe a witch or some sort of renaissance person maybe? any ideas are good, even if its not in the direction i was thinking of going with it. any pictures you could give to help show your idea would be great too since i have to make it later! Thanks!