Where did [Spoiler] go after his friend blew up the thing?

In Act 2 when >!the party splits up, Verso and Maelle battle together and Verso vanishes for a brief period but doesnt show up again until after she opens the manor door to which Verso yells something along the lines of "I knew you'd open the door for them! Im kind of lost on both where he went and the point of this line of dialogue."!<