So shield self, mark of justice as SLA.
How about zone of truth as SLA?
Maybe use some of these for inspiration?
Matter of Justice (Su): At 9th level, a justice hammer can, as a standard action, project an aura of implacable justice that unsettles his enemies. All opponents within 20 feet of the justice hammer must make a Will save (DC 10 + the justice hammer's class level + the justice hammer's Charisma modifier) or be shaken for 2d4 rounds. Those who succeed are immune to the justice hammer's matter of justice effect for 1 day. Matter of justice is a mind-affecting fear effect and is usable twice per day.
Bureaucratic Knowledge (Ex): Although battling the forces of chaos is one of the primary functions of the justiciar, she is also expected to have a thorough grasp of legal processes in civilizations all across Faerûn. Beginning at 2nd level, the character gains a bonus equal to her justiciar of Tyr level on all Knowledge and Gather Information checks related to laws or legal proceedings (such as recalling whether carrying weapons is illegal in a certain city or researching proper courtoom etiquette). She also gains the same bonus on Charisma-based skill or ability checks made to argue legal matters.
Indelible Imprint (Su): When one of the Celestial Hebdomad is slain, the dying paragon releases holy energy to brand its murderer for all time. The instant the paragon dies, all creatures within 100 feet who have dealt damage to the paragon within the past day must make a DC 37 Will save. The save DC is Charisma-based. Those that succeed suffer no ill effects. Creatures that fail receive an unsightly rune upon their faces that instantly identifies them to any lawful good outsider as a murderer of a member of the Hebdomad. The mark may be removed with a wish or miracle spell.