Can anyone tell me what these poisonous assassins were called and where they were from?

Question

I remember when I was younger hearing about these assassins that would consume small amounts of poison until they both became immune and poisonous themselves. Does anyone know what I'm talking about? I keep trying to look it up but end up with a bunch of RPG sites coming up.

Answer 1

The Hashishin a.k.a. Hashshashin a.k.a. the Order of Assassins, and a.k.a. Hashishim according to the Illuminatus! Trilogy, but I wanted to find an "official" spelling so I used Wikipedia.