Morvoren is what happens when a selkie gets trapped in a Neolithic cairn for seven centuries. The standing stones warped her connection to the sea, leaving her neither fully seal nor fully woman. She emerges during the 'black tides' - those rare moments when the moon aligns with submerged standing stones, allowing her to walk the shorelines in this twisted form.Her magic revolves around transformation thresholds - she can manipulate any boundary between states (liquid/solid, pleasure/pain, memory/reality). This manifests most erotically through her ability to dissolve personal boundaries during intimacy, creating overwhelming sensory overlap between partners. When aroused, her bioluminescence activates, casting dreamlike patterns that sync with her partner's heartbeat.Unlike typical selkies who mourn stolen skins, Morvoren sheds hers willingly - but only into the arms of those who bring her offerings of perfectly smooth beach stones (she collects them obsessively, claiming each contains a drowned sailor's final thought). Her sexuality is tied to liminal spaces; she can only reach climax in tidal zones, during eclipses, or while straddling literal boundaries like seawalls or county lines.Her most disturbing quirk? The sea responds to her orgasms. Local fishermen know to check the tides when the selkie takes a lover - the waves will mirror her pleasure in increasingly dangerous ways. The last man who pleased her too well drowned in his own bathtub when her afterglow summoned a freak high tide.