Very Rare Adventuring Gear/Weapon (Mason’s Tools/Light Hammer), Light, Nick, Requires Proficiency with Mason’s Tools, Requires Attunement

Stoneborn Mallet is the upgraded version of the Stoneshaper’s Mallet.

When used as part of Mason’s Tools, this item gives a +4 bonus on ability checks made with them. 

Stonewall. You can use your action to make a Strength or Dexterity (Mason’s Tools), immediately creating one of the following magical stone objects with its centre within 5 feet of you on a successful ability check.

(DC 13) A stone wall that is 20 ft. long, 20 ft. high and 6 inches thick..This wall is an object made of stone that can be damaged and thus breached. It has AC 20 and Hit Point equal to 2x your Mason’s Tools ability check made to create the object.

• As a bonus action, you can make stone spears emerge from the wall, forcing all creatures within 5 feet of the wall to make a DC 16 Dexterity saving throw, taking 4d8 piercing damage on a failure, or half as much on a success.
  You can’t use this bonus action on the same turn on which the wall was built. 
• As a bonus action, you can create a 5 ft. opening in the wall that lasts until the end of your next turn. 

(DC 9) A 5-foot-by-5-foot sculpture that serves as half cover for medium creatures, and three-quarters cover for small creatures. This stone object has AC 22, and Hit Points equal to 4x your Mason’s Tools ability check made to create the object.

• You can use your bonus action to make the sculpture move to a distance of up to 30 ft.
• You can use your bonus action to make the sculpture attack a creature within 30 ft. of it with the following attack.
  • Spear. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (2d6+4) Piercing Damage.
• If a creature you can see is targeted by an attack and benefiting from the sculpture’s cover against that attack, you can use your reaction to make the sculpture protect them, giving a +3 bonus to the creature’s AC against that attack. 

You must create your Stonewall objects on unoccupied space and on solid foundation. 
You can only have a number of Stonewall objects at a time equal to your proficiency bonus. You can touch a Stonewall object with the Stoneborn Mallet and use your bonus action to destroy it. When you lose attunement with the Tools, all Stonewall objects are immediately destroyed.

• When you destroy a Stonewall object by touching it, you can create an armor of stone around you, giving you resistance against Bludgeoning, Piercing and Slashing damage until the end of your next turn. 

Once per long rest, you can use your action to choose a single Stonewall object and touch it – that object stops being counted into your number of existing Stonewall objects and is not destroyed upon losing attunement. 

Stonesense. If you touch a stone object or a building, you get to know the direction and distance of its entrance nearest to you. 

Perfect Shape. Once per long rest you can cast the Stone Shape spell using the item without requiring any components.