|Source||natural - Abyss|
Abyssrocks are clear gray rocks filled with a sickly yellow-green liquid. A very rare rock of some abyssal worlds, they are hold a high concentration of entropic and demoniac energy. A non-chaotic evil creature struck by one suffers 1-4hps +1hp per level of the creature touched (Fortitude DC16 to resist all damage).
If an abyssrock and hellstone are touched together, the effects are quite deadly, causing a fiery and gaseous explosion. The damage is 6-36hps of fire damage and leaving a deadly yellow-green cloud (as the spell cloudkill) in a 15' radius. The gas cloud dissipates after 1 turn.