Vault of the Withered Eye

You forced open the gilded doors of Lady Vaereth's private cache beneath her town manor. Once a showcase of wealth and arcane curiosity, the vault now reeks faintly of rot and old lacquer. A single undead guardian — a beholder stripped of color and flesh, its central eye milky and one stalked eye reduced to a ragged, jerking thing — had been bound to the vault as an eternal sentinel. Around its collapsed form and the scattered, upended chests you find a mix of aristocratic valuables, arcane oddments the noble collected from far places, and a few items corrupted or animated by the creature's lingering necromancy. The haul blends practical wealth (coin and gems), documents of political value, and a few uncommon arcane pieces suitable for a party of 5th level adventurers.