Mark of Pain

Can anyone tell me where to find Mark of Pain if i only own Nightfall?

Pretty much any skill trader should have it. If they don't, earn yourself 1k faction, goto a Priest of Balthazar and unlock it, then find any skill trader and you can buy it.

That's only if it's a core skill.

If it's prophecies only then you have to buy prophecies to get it.

Thanks alot! Got the faction points and got mark of pain. =)