Broken Tusk

Weapon Heavy, Sword Parry
While wielding this weapon your Strength score is set to 18. If your Strength is already equal to or greater than this, it has no effect.
As an action the wielder can cause the blade to grow, increasing in length and weight and allowing the wielder to make a single, massive strike. This attack affects a certain area (chosen by the wielder) and forces all creatures within the area to make a Dexerity saving throw with a DC = 8 + Proficiency modifier + Strength modifier or take 2d6 + Strength modifier + Fighter level slashing or bludgeoning damage.
Avalanche Smash: 15ft cone
Boulder Crush: 5ft cube. This blow deals double the normal damage.
Eruption Spin: 5ft circle
Fissure Cut: 30ft line. The line is 5ft wide. Rare

The Broken Tusk is a broken grandblade. It has a core of cold hammered iron and a 'blade' of solid stone.The blade has been broken in half; creating a shear, blunt point.
The blade is engraved with ancient dwarven runes and inlaid with obsidian. Razor-sharp shards of obsidian are embedded along the edge of the blade, forming a brutal, serrated edge.
The Obsidian inlay and runes glow with a ghostly, blue light.