Purge Malevolence (Su)

At 7th level, a Knight of Ozem can attempt to dispel an ongoing spell effect from the necromancy school or one with the death or evil descriptor as part of a melee attack against a creature or object. The Knight of Ozem must declare the attempt before making the attack, and if he misses, the attempt is wasted. If the attack hits, eligible effects on the target are subject to a targeted dispel magic effect (caster level equal to the Knight of Ozem’s total character level). He can use this ability on any melee attack, but only once per round.

Foil Deathcaster (Ex): At 9th level, once per day as an immediate action, a Knight of Ozem can force an undead spellcaster he threatens to reroll a concentration check made to cast defensively. The spellcaster must take the lower result.