Sand of Hours (5e Equipment)
From D&D Wiki
|Sand of Hours fills the Phantom Hourglass.|
Wondrous item, rare
This ancient and mysterious dust is of unknown origin, but houses surprising power. A powerful relic, the Phantom Hourglass, was constructed by the Ocean King specifically to make more efficient use of its properties. You can consume the sand by using your action to either pour it into the Phantom Hourglass if you have it, or sprinkle it over one creature. In either case, the Sand of Hours becomes effectively destroyed, absorbed either into the hourglass or the affected creature.