It starts to make more more sense once it's revealed that she used him to store the immortality for her resurrection.

Cursed with Awesome: Kaulder's 'curse' is a textbook variation - the Witch Queen invoked Who Wants to Live Forever? to break him, and instead he became her kind's greatest prosecutor.

It can break stone and turn into a Flaming Sword whenever necessary.

Cool Sword: The Hexenbane, Kaulder's blade.

It also seen drifting at the end of the movie.

Cool Car: Kaulder uses a Aston Martin Rapide for his transportation purposes in the present.Colossus Climb: During the Final Battle, Kaulder jumps on top of the spider monster and kills it Just in Time before it can reach and kill the 37th Dolan.When Kaulder deals the final blow to her, a pulse of magic she unleashes during her death throes renders him immortal once again. Brought Down to Normal: The Witch Queen takes Kaulder's, or rather her immortality to complete her rebirth.The sickening angles his fingers end in are bad enough, but when the camera lingers on them as his Healing Factor sets in, we get to see a close-up of bones that move in a manner that shouldn't be possible, accompanied by sickening crunches. Body Horror: At one point, Kaulder breaks all the bones in his hand to get free from a handcuff.Badass in a Nice Suit: Kaulder wears a low key version of this - suit trousers and button-up shirt - for most of the movie.Beard of Barbarism: Flashback!Kaulder sports one reminiscent of that worn by Ragnar from Vikings.And the Adventure Continues: The film ends with Kaulder and his new partner ( Chloe) riding off to their new task.Later, Danique is able to trap him in a Lotus-Eater Machine that Chloe has to use her Dream Walker powers to break. When he's forcefully pulled out of a memory potion, he's left dazed and hallucinating so badly that Belial just goes about his business while Kaulder tries to choke Chloe to death thinking she's the Witch Queen. Achilles' Heel: Kaulder may be completely immortal, but he's still perfectly vulnerable to mental attacks.Witches pretty much don't have a prayer against him in a straight fight unfortunately, dirty tricks are the specialty of any evil witch worth their salt. In the present he's an unstoppable force with centuries of experience and Complete Immortality to back it up. The Ace: Even as a mere mortal, Kaulder was a cut above his fellows in the Order, who got slaughtered like sheep when they faced the Witch Queen in the past.

The last witch hunter cast music