This is incorrect, depending on what you mean by "their spell save dc." When you cast Saving Throw Spells, the enemy has to beat your spell save dc (8 + proficiency + [caster ability score modifier]), ~always calculated using the ability score associated with your class - intelligence in the Arcane Trickster's case. The enemy makes a saving throw: 1d20 + [ability modifier dependent on the spell] + [proficiency in that save if they have it] and compares it to your spell save DC.
So yes they add their wisdom modifier, but they add it to 1d20 (possibly + proficiency bonus) instead of their save DC.
oh, ok. Perfect example of how the wording of this stuff is confusing to us newbies! I think im starting to grasp it all then.
So weird that they dont just call it spell attack then? Considering its not added in any way to the defensive roll.
But I guess that one isnt on Larian
Edit: originally i thought I as the attacker rolled the 1d20 + my modifiers vs their spell save dc + modifiers. I guess the wording made it seem like spell save dc was like armorclass but for spells.
