On the other side of it, an Unseelie Fey Paladin of Tyranny 3/Hexblade (Dark Companion Variant) 4/Binder X gives a -6 to the saves of anyone nearby, with an additional penalty equal to their charisma bonus. This is equivalent to all damaging attacks getting +5 X (Cha+1) damage when the Paladin of Tyranny is near.
JaronK