All or Nothing Coin

Wondrous item, very rare

This strange coin brims with magical power that crackles like static electricity in your hand. It contains 1 charge and regains an expended charge each day at dawn. You can use an action to expend 1 charge by tossing it into the air, which causes a burst of magical energy to erupt in a 120-foot radius around you. For the next 30 seconds, all attack rolls made by creatures in the area are a single D20 roll without advantage, disadvantage, bonuses, or penalties applied. A roll of 20 results in a critical hit, 11–19 in a hit, and 1–10 in a miss, with 1 triggering any critical failure rules in effect, regardless of the target’s AC.