The wield slot is fairly underused among object classes, and there are a number of interesting bonuses we can add to spells if the corresponding spellbook is wielded.

• Decreases failure rate of the wielded spell (utility spells might need to be made higher-level/harder to cast to maintain balance).
• Or decreases Pw cost of the wielded spell.
• Allows you to cast the wielded spell even if completely forgotten.
• Allows you to cast the spell without knowing it already - the Z menu gets an additional “-“ option to cast from the spellbook in hand if you don’t know what that book is.
  • Casting from an unknown spellbook will immediately check for reading success as if you had read the book: if you succeed, it then moves on to other checks like whether you have enough power, etc and you may cast the spell. If you fail, you get a random failure effect appropriate to that spellbook.