Query: John had to additional ability to do what?
Context: In the Norman period, suffering the king's ill-will meant difficulties in obtaining grants, honours or petitions; Henry II had infamously expressed his fury and ill-will towards Thomas Becket; this ultimately resulted in Becket's death. John now had the additional ability to "cripple his vassals" on a significant scale using his new economic and judicial measures, which made the threat of royal anger all the more serious.