Amulet of the Great One

This amulet has 3 charges and recharges 1D3 charges daily at dawn. Well wearing the amulet you can expend the charges to do the following effects.

• 1 charge - when making an attack roll the wearer can give the attack advantage as a reaction.
• 3 charges - when an attack roll hits the wearer can make it a critical strike as reaction, when the wearer uses this ability the amulet does not recharge for 1D6+1 days.