Summoned Creatures, what is the DC of their special abilities?

[prototype00]

So say I summon a snake (as a 2nd level spell), what will be the DC of its poison? As listed in the monster manual? Or 10+ level of spell + relevant spellcasting modifier of the caster?

Cheers!

prototype00

[StabbittyDoom]

It would use the bestiary DC. Using the spellcasting DC is a special exception for polymorph giving you special abilities.

[Nefreet]

If you have Augment Summoning the DC of your summoned Viper's poison goes up by 2.

[StabbittyDoom]

Nefreet wrote:

If you have Augment Summoning the DC of your summoned Viper's poison goes up by 2.

To expand on that: Natural poisons are based on constitution and HD. Augment Summoning boosts constitution, so therefor the DC goes up the same amount as the constitution modifier (or +2).