So my first suggestion for the Restricted Section got declined but I got another Idea for it if nobody said it in suggestion already but since Lacerum Incisis isn't in the /spelllist why not do the same like the spell Scribblifors Spell but just a bit harder but the reward is very promising at the very end of the parkour than after you open the door of having the Key than it should be somewhere in the Restricted Section of right click the green sparkles to pull out the Lacerum Incisis spell book than you learn the spell in your spell inventory.