Fragile (-2)

The model is made of bones, crystals, or other hard but brittle substance. Crushing attacks (Bludgeon, Ball-and-Chain, Earthquake Maul, Flail, Flying Hammer, Heavy Weapon, Huge Weapon, Hammering Blow, Headbutt, Opportunity Flail Strike, Trample, and all melee attacks from Huge or Gargantuan Creatures) are at +1 against Fragile creatures. This Trait is appropriate for skeletal undead like Skeletons and Liches, but also for crystal golems, crystal elementals, and weaker treemen.