Chorgath wants firstly seal the day caste into the room somehow (barricade her in) so he can get time and room for Sondok make new door frame and then Chorgath carves keyhole and moving parts into it. He would seal her two reasons;<br/><br/>A) Hopeful she dies along the manse.<br/>B) She would not interfere as group travels through magical doorway or jump through it save her own ass and continue killing in Malfeas.<br/><br/>So, Chorgath keeps his present action to blockade movement while Sondok works her charm to seal day caste with magma rock walls (not directly aim at her, but rather her surroundings).