Glass Wand of Leng

Wand, rare (requires attunement by a spellcaster)

The tip of this twisted clear glass wand is razor‐sharp. It can be wielded as a magic dagger that grants a +1 bonus to attack and damage rolls made with it. The wand weighs 4 lbs and is roughly 18 inches long. When you tap the wand, it emits a single, loud note which can be heard up to 20 feet away and does not stop sounding until you choose to silence it.

This wand has 5 charges. It regains 1d4 charges daily at dawn. While holding it, you can use an action to expend charges to cast one of the following spells (save DC 17): arcane lock (2 charges), disguise self (1 charge), and tongues (3 charges).