Divine Heart. Sanctifier’s body hums with holy resonance. Undead within 60 ft. can’t benefit from invisibility and shed faint ghost-light.

Ecto-Containment Saddlebags. (Recharge 5–6) As an action, the rider can open one of Sanctifier’s rune-etched saddlebags to deploy a Containment Rune at a point within 30 ft. The rune activates at the start of Sanctifier’s next turn, creating a 15-ft. radius radiant circle. Undead entering or starting their turn in the circle must make a DC 15 Charisma save or be paralyzed until the end of their next turn.

Spirit Siren. When Sanctifier gallops, his hooves emit an otherworldly chime. Once per short rest, as a bonus action, he can release a piercing wail that forces undead within 30 ft. to make a DC 15 Wisdom save or be frightened for 1 minute.

Auto-Pursuit Mode. Sanctifier can pursue an undead creature he has seen within the last hour. He always knows the direction of that creature while within 1 mile.

Hooves. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage + 4 (1d8) radiant damage

Crossing the Streams Rearing Charge. If the horse moves at least 20 feet straight toward a creature and then hits it with a hooves attack on the same turn, that target must succeed on a DC 14 Strength saving throw or be knocked prone. If the target is prone, the horse can make another attack with its hooves against it as a bonus action.

Proton Lance (Recharge 6). Ranged Spell Attack: +6 to hit, range 60 ft., one target. Hit: 18 (4d8) radiant damage.  On a failed DC 15 Strength save, the target is restrained by spectral bands of light until the end of its next turn.

Containment Discharge (1/day). Sanctifier releases a 20-ft. radius radiant pulse. Undead in the area take 21 (6d6) radiant damage. (DC 15 Dex half); living creatures are unaffected except for a brief shimmering halo.