Obsidian

#uncommon-material #stone

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Obsidian, a black to deep purple, glass-like stone, possesses an unparalleled sharpness. Formed through rapid cooling of volcanic lava, its razor-edged surface makes it a coveted material for crafting exceptionally keen and deadly blades.

Armor. While wearing a medium or heavy armor (non hide) made with obsidian, any creature that grapples you takes dice: 1d4 slashing damage.

Weapons. A weapon or piece of ammunition made with obsidian deals an additional dice: 1d4 slashing damage.