Lady Malvora plots with her son Vittorio to claim that he is the one killing the practitioners to prove how easy it woud be to defeat the White Councilwizards by depleating their ability to breed more wizards. Their main objective is a coup against House Raith.
Lady Malvora ripped the arm off of a ghoul and crushed its skull with it. Then four more engulfed her, tearing her apart.
Later, it comes out that Lara Raith had manipulated her and House Skavis into betraying her court so that she could control the inevitable coup.