Hi,
I've got a doubt about Spell Item casting, with "at will effect". I know that "item casts the spell and provides all the requisite PP" (CoM, p. 110), and "the possessor may have to make a successful Attunement maneuver in order to utilize the spell ability - thereafter its owner can activate the imbedded spell as desired". So, possessor don't have to know the spell imbedded in the item for using it.
If the imbedded spell is an Acid Ball (elemental spell), may i use with the attack roll the level skill on the spell of the creator of the magical item to determine if the elemental attack does damage when i use it, or something else ?
Best wishes,