Manaberry (Neo)

Magical item:

manaberry.

Consume to regain 100mp. For anyone other than the Gamer, the same, but then half that much with each successive fruit eaten within an hour's time, rounded down.

Any excess health is lost.

Can be parted to divide its effect appropriately among multiple doses or consumers.

Reference
Acquired in Chapter 97 "Not Yet A King Without A Kingdom"