Yeah, I had prefix and suffix confused. Pestilent prefix is the difficult one to get. That's 175 alone, then with the of anthrax it gets up to 451Poison prefixes in order are Septic, Foul, Toxic and Pestilent. The suffixes are Blight, Venom, Pestilence and Anthrax. So, the biggest would be a Pestilent small charm of Anthrax. In Kronos' guide to charms he said that they can get close to 400.