Do you think I'm cruel? (class: Assassin)
Sometimes, it really is that simple.
ASSASSIN
Starting equipment: Clothes that conceal [choose one: small movements; a one-handed weapon; your identity]; an assassin's teapot and two glasses; an indelible but subtle physical mark from [choose one: your guild; a god of death]
Starting skills: [choose one: religious doctrine; military etiquette; martial arts]
Gain proficiency with 1 type of weapon per Assassin template. You can gain the proficiency the moment you touch the weapon, or delay choosing for as long as you like.
A: Elimination
B: +1 Elimination
C: +1 Elimination
D: +1 Elimination
Elimination: You can designate a target for Elimination, once ever. (Once more each time you gain a level in Assassin.) When you attack a target designated for Elimination, if you hit, the target is destroyed/killed/etc. (It works on undead and robots and such. They don't come back to life or turn into vengeful ghosts or anything like that.) You can tell people about your ability to do this and they will understand that it's real.
This is part of a bandwagon. Observe.
In this one, I leave it to you, the player, to orchestrate the job. You will probably want to figure out some way to get to the target, which I almost gave you, but then I remembered that would be boring. Likewise, you'll probably want an exit plan. You may want to get some poison. I think that could be fun to do. Especially if you want to make sure it can't be traced back to you. Good luck out there.
I hope it goes without saying that if you're letting players hire NPCs with class levels, silly things are likely to happen if you make this one available.
I would imagine referees will eventually need to make a ruling about what happens if an Assassin threatens to use their Eliminate ability on an opponent, in order to end the fight without fighting. My suggestion would be that enemies understand you only get a limited number, but they don't know when you have or haven't used it already (unless they can deduce it from other information!). Given time to think, most people would likely conclude that the Assassin would never give up such a powerful ability for cheap, and as such, they can most likely do quite a lot of non-fatal harm to the Assassin without getting Eliminated. (Of course, you can still stab them normal-style.) But, do you get a lot of time to think in a fight? I'd just make it a morale check the player can trigger on their turn, probably. Maybe failing doesn't make them flee but rather negotiate. If you do that, you're going to want another ruling about what happens if one of the Assassin's allies tries to stab the guy while they're talking.