Ex vs Su: DC?

[heirodule]

So looking at the definition of Su abilities, it says the DC of these go up with hit dice (1/2 HD is added to the DC)

What about Ex abilties with a DC? shouldn't they go up with hit dice too?

The Aboleth Savant seems to factor the HD into the original DC design, but then shouldn't the tentactle and mucous DC also go up with the greater HD of the creature.

I think its just an important part of advancing a monster to make sure all DCs go up a bit. If they didn't it makes the abiltiy silly. Why does there seem to be a gap for the Ex abilities. Is it that most won't *have* a DC?

 

[hong]

Both Ex and Su abilities generally use the (10 + 1/2 HD + ability mod) formula. This rule is broken in certain places, and I'll give you an example as soon as I can think of one.

 

[Hypersmurf]

Both Ex and Su abilities generally use the (10 + 1/2 HD + ability mod) formula. This rule is broken in certain places, and I'll give you an example as soon as I can think of one.

Half racial hit dice, specifically - class levels won't help.

-Hyp.

 

[IanB]

Half racial hit dice, specifically - class levels won't help.

-Hyp.

Hm, I think that may be at odds with some of the stat blocks on the backs of DDM cards, but those are certainly anything but error-free.