Spell Attack Rolls
If you cast spells, you might be able to make a spell attack roll. These rolls are usually made when a spell makes an attack against one of a creature’s defences.
The attribute modifier for a spell attack roll depends on how you gained access to your spells. If your class grants you spellcasting, use your spellcasting attribute modifier. Innate spells use your Charisma modifier unless the ability that granted them states otherwise. Most sources of spells specify which attribute modifier you use for spell attack rolls in the ability that granted them. If you have spells from multiple sources, you might use different attribute modifiers for spell attack rolls for these different sources of spells. For example, a dwarf disciple with the Stonewalker species talent would use their Charisma modifier when casting Meld into Stone from that talent, since it’s a divine innate spell, but they would use their Wisdom modifier when casting Heal and other spells using their disciple divine spellcasting.
Determine the spell attack roll with the following formula.
If you have the ability to cast spells, then you’ll have a proficiency rank for your spell attack rolls. Like your ability modifier, this proficiency rank may vary from one spell to another if you have spells from multiple sources. Spell attack rolls can benefit from circumstance bonuses and status bonuses, though item bonuses to spell attack rolls are rare. Penalties affect spell attack rolls just like any other attack roll, including your multiple attack penalty.
Sometimes, instead of requiring you to make a spell attack roll, the spells that you cast will require those within the area or targeted by the spell to attempt a defence check against your Spell Skill to determine how the spell affects them.
Your spell skill is calculated using the following formula.