Bell of Alarm (Patreon)

Bell of Alarm
Wondrous item, common

This brass bell doesn't have a clapper inside it and has 4 charges. As an action, you can expend 1 of the bell's charges to shake it and speak its command word, followed by a total number of hours, minutes, or seconds equal to no more than 8 hours. After the specified amount of time has passed, the bell emits a loud ringing in your ears that's audible to only you, provided that you're within 1 mile of the bell and are on the same plane of existence. You can mentally end a timer at any time using a bonus action.

The bell regains all expended charges daily at dawn.

Suddenly, in the middle of the kobolds' warren, Krag remembered that he had been cooking an owlbear steak over the campfire—before the ambush, the chase, and now this, that is. He had been looking forward to that steak for days, and now, deep in his heart and stomach, he knew that it would be overcooked by the time he could return to the flame to turn it.

So it was with redoubled vigor that Krag swung his axes, flinging kobold after kobold away from the fray, as he tried to sate his hunger and his loss with vengeance, instead.