Kinda like Hungry Hungry Hippos. Except instead of a nutritionally panged hippopotamus, it's a large cube with a face.

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This pack adds the Midnight Gobbler, a dangerous mob that only appears at night. Designed to add a new threat during nighttime, any player with food in their inventory at the stroke of midnight during a new moon will attract the ravenous Gobbler. The creature uses an arsenal of moves to fight you and will prove difficult, but if defeated it may drop useful resources.