Save from spell vs magic item

[Merm7th]

So I have an artifact that casts a third level spell (major image) once per day. The item has a CL 25.

Is it true it casts the spell at 25th level with the appropriate area and range, but with a weak save DC of 15?

[Azten]

Unless it states the DC is different than yes. Though I think it should be 14 in this case(10 base, 3 spell level, 13 Int needed to cast the spell).

[Create Mr. Pitt]

Is this an artifact in an AP or other source or homemade, because for a homemade artifact it would be perfectly reasonable for the DC to based on a higher CL, such as 25.

[Merm7th]

Azten you are correct in the math catch. I meant 14.

Create Mr. Pitt, it is from an AP.

[Jeraa]

Create Mr. Pitt wrote:

Is this an artifact in an AP or other source or homemade, because for a homemade artifact it would be perfectly reasonable for the DC to based on a higher CL, such as 25.

The DC to save against a spell has nothing to do with caster level. It could have a caster level of 10 million, and the DC to resist wouldn't change.

That being said, if the spell was cast with the Heighten metamagic feat added (magic items that cast spells can have metamagic feats included at creation), the DC to resist would increase as normal. But even then, you are looking at a maximum DC of 23 (10 + heightened to 9th level spell + 4 from minimum ability score of 19).

Also, as an artifact, it doesn't need to follow the rules exactly. There is a a reason artifacts are beyond creation.