Quote Originally Posted by Agi Hammerthief View Post
maybe he made a trade:
be unkillable till all evil is destroyed for the price of his „detect evil at will“
If the player was smart, then he should partner with another paladin. Magic Circle of Evil, Zone of truth, and discern lies should ensure the second paladin is trustworthy.

I'd add that Kore has a prideful flaw. "Detect Evil? Evil is what I say it is!"