If Lolth wanted the Matron dead Xyhri would have done it or arrived at the house with a cadre of priestesses to do it. Not commanded some lowly male Drow to slay a matron; even a bad one.<br/><br/>So what Aeriyon did was give Abduxuel the opportunity to not only become matron but to also eliminate Elvas as he was the one that introduced Aeriyon to the house so it’s easy to implicate him as being the mastermind of the assassination plot.<br/><br/>I agree with Zaer that sloppy assassins are at best expendable tools; the best assassins kill without anyone being the wiser that they were even involved.<br/><br/>