Force of Will

Weapon

Legendary oh I'm sorry, was that supposed to hurt?

Focused, Forge worker, Heavy, Prime, Relentless, Sweeping, Two-handed
Base Weapon: Maul

The journeyman's piece of Tieran. It was supposed to be a simple smithing hammer, one fit for her size, but put the masterpiece of most smiths to shame much to her teacher's dismay.

Weapon Art:

Adamantine Resolve. As an action, Choose up to 10 creatures on this plane. For the next 3 rounds, they gain 4d10+11 HP at the start of each of their turns.

Rules for weapon arts can be found here: Soulcraft Weapons

Complicated Properties

Focused. While holding this maul, you have resistance to psychic damage.

Forge Worker. While holding this maul, you have resistance to fire damage.

Prime. You can use any ability score as the modifier for this weapon.

Relentless. you can add your Proficiency Bonus to both attack and damage rolls.

Sweeping. When you miss a melee attack, add +1 to the next damage roll you make on this turn.