Two separate compartments make up this black glass canister the size of a helmet. The large lower compartment contains hundreds of jagged shards of obsidian. The upper airtight chamber contains a sticky resin that hardens immediately upon contact with air. When you strike the canister with a bludgeoning melee weapon as a standard action, both compartments shatter, causing the obsidian shards to adhere to the weapon. The weapon deals piercing damage rather than bludgeoning damage for 10 minutes, at which point the resin dries and the shards fall off, or until you roll a natural 1 on an attack roll, which causes the shards to break off prematurely. If the weapon is made of a special material, the special properties of its material are suppressed while the obsidian shards adhere to the weapon.
If you use a rockshard canister to coat an unarmed strike or natural weapon, you take 2d6 points of piercing damage when shattering the canister to apply the shards. For unarmed attacks, this can be avoided by carefully applying thick leather or rope straps to your hands and feet, which requires 5 minutes of work, prior to smashing the canister.
- Melee Tactics Toolbox
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