In other words, the power of the spell (or the praise) is as powerful as who cast it. This is what I was thinking, but the rules didn't say nothing about.
To me, it seems too powerful hat a level 3 caster can remove any poison, this lets poison nearly useless.
I make the mistake of translating a d&d module to RM at it was plenty of magic potions and I tried to adapt these potions to RM spells, but now, I realise that this is not the way RM works, in dungeons there are more magic items to compensate the lack of spells a caster can cast in a a Journey. Also, I like the flavour of make herbalism more relevant when dealing with poisons.
Thanks