Spell Dc Help

[habibo]

Hello using Battering blast as the example
http://www.d20pfsrd.com/magic/all-spells/b/battering-blast
So if i have spell focus evocation or greater both adding +1 to the d.c.
Does this effect the dc of the bull rush attempt the spell allows?

Further if you have a dusty rose ioun stone it has a resonant effect with a wayfinder giving +1 cmb now do either, both, or neither add to the bull rush effect?

[Jeraa]

habibo wrote:

Hello using Battering blast as the example

http://www.d20pfsrd.com/magic/all-spells/b/battering-blast
So if i have spell focus evocation or greater both adding +1 to the d.c.
Does this effect the dc of the bull rush attempt the spell allows?

Further if you have a dusty rose ioun stone it has a resonant effect with a wayfinder giving +1 cmb now do either, both, or neither add to the bull rush effect?

Spell Focus will not effect the bull rush attempt in any way. The only thing affected is whether or not you fall down from a successful bull rush attempt. But it doesn't make the actual attempt any easier.

Without knowing the specifics regarding the wording of the ioun stone, I would still say no. Generally such an item would boost your CMB. The spell has its own CMB that isn't connected with CMB in any way. Now if the item boosted your Inteliigence, Wisdom, or Charisma (whichever was the highest) or boosted your caster level, it would effect the spells bull rush. as the spells CMB is derived from those.

[Val'bryn2]

I would say yes, you're still making a CMB check, just using your caster level as BAB and your casting stat as your strength.

[John Murdock]

no spell focus applies only to the DC, it wont help you perform a CMB, and spell focus won't also help you overcome spell resistance or help you to attack with a spell