Voice from the Past (1/Day). The professor can cast the contact other plane spell to contact a long-dead spirit, using Intelligence as the spellcasting ability.

Spellcasting. The professor casts one of the following spells, requiring no material components and using Intelligence as the spellcasting ability:

At will: comprehend languages, dancing lights, guidance

2/day each: locate object, mage armor, passwall

Multiattack. The professor makes two Spectral Scroll attacks. It can also use Weight of History, if available.

Spectral Scroll. Melee Spell Attack: +7 to hit, reach 30 ft., one target. Hit:15 (2d10 + 4) force damage. If the target is a creature, it must succeed on a DC 15 Strength saving throw or be knocked prone.

Weight of History (Recharge 5–6). The professor magically compresses time around up to six creatures of its choice that it can see within 30 feet of itself. Each target must succeed on a DC 15 Wisdom saving throw or be restrained for 1 minute, but the restrained target's speed is halved instead of being reduced to 0. At the start of each of its turns, the restrained target takes 4 (1d8) force damage. A restrained target can repeat the save at the end of each of its turns, ending the effect on itself on a success.