Forgotten Reliquary of the Stonevault

In the lower level of an old underground dungeon, the party discovers an undisturbed reliquary tucked behind a crumbling masonry screen. There were no guardians in the chamber — the door had been sealed generations ago — but traps and a simple puzzle-ward protected the cache. Inside are relics and practical supplies a small cult or reclusive artificer once kept: a handful of tradeable gems and art, reagents for making potions and minor enchantments, and a single uncommon magical item likely placed there for safekeeping rather than display. Nothing found is oversized or obviously illogical for a dungeon (no full plate from a beast, no cavalry saddles), but the collection would fund a few adventures and give a clever crafter a head start.