Hamarhraft

Hamarhraft is an uncommon Maul that deals Thunder damage in an area around the wielder when they land a Jump.

The Dwarven grammar is garbled, but the weapon's name suggests something about the importance of first impressions.

Properties

Damage: 2d6 (2~12) + Strength modifier ⁠Bludgeoning
Details:  Mauls;  Rarity: Uncommon; Enchantment: None;  Two-Handed;  Dippable; Consumable by  Gale;  Melee: 1.5 m (5 ft);  Weight: 4.5 kg (9 lb);  Price: 65 gp; UID
MAG_Mobility_ExplosionOnJump_Maul

UUID
efb003c3-af98-43d7-bcf4-af29702fb531

Stats
MAG_Mobility_ExplosionOnJump_Maul

The holder of this item gains:

Shockwave: When the wearer  Jumps, they deal 1d4⁠⁠Thunder damage in a 3 m (10 ft) radius upon landing.

Main Hand Only

Tenacity: When you miss a melee attack, you deal Strength Modifier⁠⁠Bludgeoning damage (minimum of 1) anyway.

If you have proficiency, equip in main hand to gain:

 Backbreaker (): Put extra force behind your strike to possibly knock your enemy  Prone. ( Recharge: Short rest.)

 Concussive Smash (): Hit an enemy with all your might to deal damage and possibly  Daze them. ( Recharge: Short rest.)

Waukeen's Rest X: -85 Y: 631: in a gilded chest in one of the burning rooms on the top floor of the inn

If the party long rest after saving  Florrick and  Benryn, the fire in the building is extinguished and the chest is destroyed, but the weapon inside is still intact and can be picked up.
Because  Shockwave triggers on every  Jump taken during a turn, wielding this weapon while using  Step of the Wind allows for many triggers of Shockwave in one turn.
 Shockwave does not require a jump in order to trigger. It can also trigger when landing from  Fly and actions with similar effects but different names.
This item pairs well with  Crusher's Ring and / or  Eagle Heart.

Regarding Tenacity:

If a weapon action misses, using Tenacity does not trigger its effects.
As Tenacity deals weapon damage even if an attack misses, it can trigger many on-hit effects from equipment. For example, from the  Gloves of Power, the  Callous Glow Ring, weapon coatings, or any infusion from the  Ring of Elemental Infusion.

Regarding Tenacity:

As  Horde Breaker (Melee) rolls invisible, zero-damage weapon attacks against all enemies in the Horde Breaker area of effect, Tenacity can be prompted to trigger against them even if the first attack hits. It is therefore possible to score 2 hits in one attack: the full attack against the original Horde Breaker target and a Tenacity hit against another target.