Preceptor Seluvis is a character in Elden Ring. He is a nefarious mage that offers the Tarnished (Elden Ring) a choice of puppets. Later he offers the the Tarnished the opportunity to betray Ranni The Witch by turning her into a doll.
It is theorized that Seluvis is actually a puppet himself, under the control of Pidia, given the posture that he is found in, when dead, is the same as the posture that his puppets are in.