I've never seen it, but GM at a game today claimed that on a crit poison dealt extra damage or increased the save DC. I couldn't find anything about it in the core book at the table. Anyone know what he could be referring to / heard about this?
Sounds like a house rule. Most things that are added effects to your damage such as Shocking on a weapon or precision damage (like sneak attack) don't get any benefit from a crit.
yeah i was just looking to get rules confirmation on it. game days always bring up a few fun questions. I learned today that Dispel Magic got a boost by removing the caster level 10 max =)