Archivist

Though most investigators fill their grimoires with hard-won knowledge borne from encounters with supernatural threats, some prefer to do bookkeeping instead. Such archivists seek to accumulate knowledge, more so than trinkets, by spending untold hours digging through disparate tomes of occult secrets and compiling them into encyclopedic texts on the supernatural. Through their research, archivists become academic masters of the arcane, and priceless reservoirs of obscure knowledge.

Level 3: Trinket

You’ve collected a powerful trinket to enhance your ritual magic:

Archaic Scroll. You can perform a ritual spell with your Rushed Incantation feature without expending one of the feature’s uses.

Level 3: Thesis

You gain access to certain spells associated with your thesis. Pick one of the following subject areas for your thesis: Corpus, Ignis, Mortis, or Regis. You gain a list of associated thesis spells. Once you gain access to a thesis spell, it is added to your grimoire. If you gain access to a spell that doesn’t appear on the Investigator Spells list, the spell is nonetheless an investigator spell for you. You can use your action and expend a use of your Rushed Incantation feature to cast one of your thesis spells.

Corpus

Ignis

Mortis

Level 6: Erudite Spell

You’ve mastered the intricate theory of arcane propagation. When you cast a spell that forces a creature to make a saving throw to resist its effects, you can give one target of the spell disadvantage on its first saving throw against the spell.

Once you use this feature, you can’t use it again until you finish a short or long rest.

Level 10: Encyclopedic Expertise

You can identify any arcane effect from memory. Whenever you witness a spell being cast or investigate a magical effect, you can always identify the spell that was cast, the magic item responsible, or the monster which produced the effect. However, this ability fails to identify spells, magic items, and monsters that are utterly unique or are otherwise not recorded in arcane texts.

Level 14: Eidetic Memory

You can effortlessly duplicate spells you see in the world. You can copy any ritual spell you see being cast into your grimoire.

Moreover, you can precisely copy the exact motions of a spell’s casting to duplicate its effect. When you see a spell of 5th level or lower being cast, you can use your action and spend 1 use of your Rushed Incantation feature to cast the spell yourself without expending a spell slot. To use this ability, the spell must have a casting time of 1 action, must have been cast within the last minute, and must not have expensive material components that indicate a cost or are consumed by the spell.

Once you duplicate a spell in this way, you can’t do so again until you finish a long rest.