The user of Mjolnir becomes the Champion of the god Thor and automatically gains proficiency in Athletics. Mjolnir rejects every evil creature. If an evil creature tries to wield Mjolnir, it takes 1d8 thunder damage and is pushed 3 feet away. 

You gain a +3 bonus to attack and damage rolls made with this magic weapon. It has the thrown property with a normal range of 20 feet and a long range of 60 feet. When you hit with a ranged attack using this weapon, it deals an extra 1d8 normal damage. Immediately after the ranged attack or at your command, the weapon flies back to your hand. When you hit an enemy, whether melee or ranged, it deals an extra 1d8 thunder damage*.

Mjolnir has 10 charges. While holding it, you can use an action to expend 1 or more of its charges to cast one of the following spells from it, using your spell save DC: Thunderous Smite (1 charge), Shatter (2 Charges), Call Lightning (4 charges), Destructive Wave (5 charges). 

Mjolnir regains 1d6 + 4 expended charges daily at dawn. If you expend the last charge, roll a d20. On a 1, Mjolnir loses 1 charge for 1 month. The charge will only be regained after 1 month if, during this period, another charge is not lost. In this case, Mjolnir will regain the 2 or more charges after 2 or more months (3 charges = 3 months and 4 charges = 4 months). If you lose 5 charges, Mjolnir will need 1 year to regain all lost charges and the person who lost the last charger becomes rejected by Mjolnir and will never be able to wield it again.

*this damage is added to the Divine Strike's Tempest Domain cleric. 

Proficiency with a Warhammer allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Aligment required: Lawful Good, Neutral Good and Chaotic Good. Required proficiency in Religion. , Versatile, Push