Alchemist beastmorph

[Ronin3058]

I have a question about the beastform mutagen.

The 3rd level beastform mutagen says that you gain 1 ability from the spell "alter self"
This doesn't mean you change size when you get the +2 dex, right?

This bonus is a size bonus, like the spell description says.

So what happen if I cast enlarge person?

I will get a -2 dex size bonus from enlarge person but I have already a +2 size bonus from beastform mutagen.

Size bonuses never stacks with each other.

So what happens if I get the beastform mutagen with +2 dex and I cast enlarge person on myself?

Is one effect dispelled or does the dex penalty and bonus even it out?

[Drejk]

Size bonuses never stack. Penalty is not a bonus so it should "add" to a bonus for a net of +0.

However, the ability from the alter self spell probably refers to darkvision, low-light vision, swim, etc. and not one of the packages associated with size of the new form. At least that was my reading since I saw that feature for the first time.

[Corlindale]

Yeah, you don't get the ability or size mods, you just get to pick one of the special abilities. So there's no stacking issues.

[Cheapy]

Yep, you aren't affected by alter self, you just choose one of the abilities listed in the spell. Not including the ability mods.

[Ronin3058]

Thanks for clarification!