Wand of Magic Detection

While holding this wand, you can use an action to expend 1 charge to cast __detect magic ._ This wand has 7 charges and regains 1d6+1 expended charges each dawn. When the last charge is expended, roll a d20\. On a 1, the wand violently shakes and sparks with magic then disappears.

Source: Level Up Advanced 5e · OGL-1.0a · 5.1