I disagree about the class lock for casting from scrolls (I know, I know, but if I want a party full of clerics or warlocks and I am completely locked out of purchasing or finding certain scrolls that would be kinda boring imo) however, I do agree about the fail chance. If you try to cast a spell from a high-level scroll and you're not ready for it, there should definitely be a roll for it. (Except for revivify)
EDIT: I agree with Stabbey below, though, that class-locks for learning a spell should exist. A Wizard should not be able to learn spells from another class list.
Last edited by King Qyote; 07/10/20 03:13 AM. Reason: clarification