Thunderclap

Warhammer, very rare (requires attunement)

This warhammer is a magic weapon that grants a +2 bonus to attack and damage rolls made with it. While holding it, you gain a +2 bonus to Armor Class, and saving throws.

The warhammer has 20 charges for the following properties.

The hammer regains 2d8 + 4 expended charges daily at dawn. If you expend the last charge, roll a d20. On a 1, the hammer retains its +2 bonus to attack and damage roll but loses all other properties. On a 20, the hammer regains 1d8 + 2 charges.

Power Strike. When you hit with a melee attack using the hammer, you can expend up to 3 charges to deal an extra 1d6 thunder damage to the target per charge spent.

Spells. While holding this hammer, 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 and

spell attack bonus: levitate (2 charges), shatter (2 charges), thunderwave (5th-level version, 5 charges).

Retributive Strike. You can use an action to strike the hammer against the ground or another solid surface, performing a retributive strike. The hammer is destroyed and releases its remaining magic in an explosion that expands to fill a 30-foot-radius sphere centered on it.

You have a 50 percent chance to instantly travel to a random plane of existence, avoiding the explosion. If you fail to avoid the effect, you take force damage

equal to 16 x the number of charges in the hammer. Every other creature in the area must make a DC 17 Dexterity saving throw. On a failed save a creature takes an

amount of damage based on how far away it is from the point of origin, as shown in the following table. On a successful save, a creature takes half as much damage.

Distance from Origin Damage

10 ft. away or closer 8 x the number of charges in the hammer

11 to 20 ft. away 6 x the number of charges in the hammer

21 to 30ft. away 4 x the number of charges in the hammer