All in Coin

This silver coin, similar to any other coin, portrays a 1 on one side and a 20 on another. Upon utilizing this coin its result will determine the outcome of any roll it is being used for, that outcome being either a natural 1 or a natural 20. To determine the coin result roll 1d20; a result of 1-10 results in the coin landing on 1 and the roll it is being used for is a critical failure (natural 1), a result of 11-20 results in the coin landing on 20 and the roll it is being used for is a critical hit (natural 20).

Notes: long rest must take place in a peaceful state without stirring or being interrupted.