Trust me it's hard. I'm playing a Drow Rogue who is a Rogue, but later I am planning on taking Assassin levels. It will take many MANY CDQ's and real life months to RP your character to evil. Could be even longer than that depending on your current Alignment. As far as I know, there has only been one, ONE evil PC in all of Layonara. It's going to be a tough road but it can be achieved. And certainly not at level 10. You would also need a very in depth and lengthy Character Development Thread that tells of the character's development and how the character feels about doing evil things.