Research delerium spells that you found in spellbooks, scrolls or can learn from a teacher.

Have a look at the spell list for unlocked spells that can possibly be researched (the ones with a crystal in front).

Prerequisites

• you are a spellcaster
• spellbook, scroll or teacher

Cost

• per spell level
  • 2 days of downtime
  • 100 gp

Outcome

• replace one of your known spells with the researched spell