Deep Sashelas, Lord of the Undersea
Deep Sashelas is a charismatic leader and an inspired creator whose art is everchanging. Unlike the other Seldarine, Deep Sashelas is rarely satisfied with what he's done and always seeks to improve it. Deep Sashelas can be fickle and flighty, and there are many myths that involve his amorous exploits with such creatures as mermaids, mortal sea elves, human females, and even a demigoddess.
Published in Forgotten Realms Campaign Guide, page(s) 81.