Help me understand spell DCs

[graeme mcdougall]

As far as I can tell, nowhere is it actually spelled out how to calculate spell DCs.
We are left to infer it from more general information scattered through the book.
I want to see if I have it right, for example for a wizard :

10 + Character Level + Int Modifier

I get this from :

- page 8 'Your Difficulty Class'
- page 136 'Arcane Spellcasting'
- Page 291 'Determine the difficulty Class'

What confuses me, is you normally add proficiency level as well.

The Wizard, on pg 135, in the sidebar has 'Spells' - Trained in Arcane Spell rolls and DCs & in attack rolls for Arcane spells.

So this is +0 for trained. But can the wizrd ever be more than trained in Arcane spell rolls & DCs ?

And if so, does he do it by adding ranks to the 'Arcana' skill ?

And if so, would the formula be ? :

10 + Character Level + Arcana Proficiency + Int Modifier

They could really do with explaining spell DC calculation at the beginning of the spells chapter, with a specific example.

[Xenocrat]

All spellcasters get Expert at level 12, Master at level 16, and Legendary at level 19. It's in their class write ups and on their progression tables.

[graeme mcdougall]

Perfect,that's what I missed, Thank you !
It would be great if the formula were explicitly explained like it was in Starfinder CRB.
The section on page 291 doesn't give a spell example,