Kefka, once poisoned a whole castle full of people. And laughed about it as they died. From Final Fantasy VI.
GLaDOS, once murdered an entire facility full of scientists and enslaved their children, for science! From Portal.
LeChuck, once incinerated people using a rigged fairground ride so he'd have more corpses for his army of the undead. From Monkey Island.
Revolver Ocelot, once made a career out of betraying his allies and getting them all killed. From Metal Gear Solid.

Didn't kefka have a spell called RUB?

Which killed you?

Maybe. Final Fantasy 1 had that too, so it wouldn't surprise me.

Yeh, I saw it in FF1 as well. I don't get how rubbing kills you.

OH NOEwS! He iZ RubBing me!! ArrGh!

I just assumed it was a weird translation of 'erase'. As in 'erase you from existence'.

That'll kill you pretty good :)