Ash's memory issues

Clue found in Accord HQ
Tiffany’s notes, you can find the following in between what seems to be a lot of arcane symbols and equations:

Memory loss caused by demonic spell blocking knowledge

Soular energy repository needed if we can’t get the demon who cast it to lift the spell

Should be traceable? Spell that permanent on a person could be a token

Holy oil needed for ritual- 5 bottles (backups in case we need to try multiple times)

Items to help them remember are crucial, people even more so

Think Mark might have been fighting near Ash when they got hit? I need to bug him for details to see if he heard the demon’s name when I get back to London- hopefully Ash being here in this house might help dislodge the spell somewhat at least...