Hang on, I thought that all scrolls scaled off of intelligence? Unless it’s a utility spell like Misty Step. Then everybody is good to go with it.
it is more complicated than that: "Spells learned from taking levels in a class will use that class' spellcasting ability modifier. Spells from other sources use the spellcasting ability of the class the creature most recently took a first level in."
Spellcasting ability can be either intelligence, wisdom or charisma. So, if I understand correctly, if you are a level 10 wizard and you then take a warlock level, your spellcasting ability for a scroll based attack roll will be charisma.
