Serr can use an action to manifest a spectral mind as a Tiny object within 60 feet. The mind can see and hear, telepathically communicate with Serr, and relay what it perceives. Serr can cast spells as though occupying the mind's space. The mind lasts for 10 minutes, until dismissed, or until incapacitated, and can be used a number of times equal to Serr's Intelligence modifier per Long Rest.

Serr withdraws into the shell, gaining a +4 bonus to AC and advantage on Strength and Constitution saving throws. While withdrawn, Serr is prone, speed is 0, and Serr cannot take reactions. Serr can emerge as a Bonus Action.

Serr makes a melee attack with the quarterstaff. On a hit, the target takes 1d6 bludgeoning damage plus Serr's Strength modifier, or 1d8 bludgeoning damage when wielded with two hands.

Serr makes a ranged or melee attack with a dagger. On a hit, the target takes 1d4 piercing damage plus Serr's Dexterity modifier.

Serr has a spellbook containing six level 1 wizard spells. Serr can use the spellbook as a spellcasting focus for wizard spells and can perform the Ritual Adept feature with wizard spells that have the Ritual tag in the spellbook.

Serr has learned three wizard cantrips and can replace one wizard cantrip whenever Serr gains a Wizard level. Serr can add wizard spells to the spellbook when finding suitable magical writings and can prepare four wizard spells from the spellbook after a Long Rest.

Serr can cast a spell as a Ritual if that spell has the Ritual tag and is in the spellbook, without expending a spell slot and without having it prepared.

Serr can usually recall information learned through study and can identify where to seek obscure lore, provided the information exists in a source accessible to scholars. Serr also possesses a scholarly network of librarians, scribes, teachers, and fellow researchers who may provide information or assistance at the DM's discretion.