Two times

They are part of a spawn cult, which is why they're not very intelligent. They have black hair, a small ponytail, or something like that. They also have a second life that happens when they die.
There is a ritual dagger that, if used to stab a killer in the back, can stop him for a couple of seconds.
(they remember everything that happened and they look like they did in a past life)
pronouns - it/they