The Book of Eldritch Whispers

A series of writings listing forgotten deities imprisoned in the Vault of the Progenitors found on a distant world called Ocdae, an unreachable planet that has slipped backwards in time. The text also includes a tale of noble-born heroes changing their universe to prevent an army of fish-like alien monsters trying to mutate the heroes' homeworld, an event they refer to as "The Doom."

The book also includes a Scroll of Protection Vs. Aberrations.

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SCROLLS OF PROTECTION

Usable by any class, not just a spellcaster. Each scroll of protection works against a specific type of creature as listed.

Using an action to read the scroll encloses you in a invisible barrier that extends from you to form a 5-footradius, 10-foot-high cylinder. For 5 minutes, this barrier prevents creatures of the specified type from entering or affecting anything within the cylinder.

The cylinder moves with you and remains centered on you. However, if you move in such a way that a creature of the specified type would be inside the cylinder, the effect ends.

A creature can attempt to overcome the barrier by using an action to make a DC 15 Charisma check. On a success, the creature ceases to be affected by the barrier.