Advanced Goblins cast this on any weapon intended for sale to other races. They're increasingly using it on all of their weapons.

There are variants of this spell that turn the weapon into harmless gas, sandstone or some other useless material. There is one recorded case of a goblin weapon exploding into a ball of flame! If the GM wishes to use this kind of nasty variation, it's recommended that no more than one in twenty goblin weapons do this (about 5 or less on 3d). It's mostly just to inspire fear, but some goblin wizards do this out of pure sadistic joy.

Create (Solids, Large Category) 1 [8] 
    Delay (Triggered) [+50%] 
        Triggered by a non-Goblin using the weapon on a Goblin 
        Guns: After a single shot 
        Explosives: Liquefies instead of going off 
        Other Weapons: After a single attack 
        Can be removed by any magic dispelling effect 
            Passing through a No Mana Area will suppress it, but 
                won't remove it 
    Based on Activation Roll [+5%] 
    Reduced Fatigue Cost 1 [+20%] 
    Transmutation (Solid to Water) [+50%] 
    Transmutation Only [-100%] 
    Only Works on Weapons [-40%] 
    Reduced Duration (x1/60) [-35%] 
    Magical [-10%] 
    Spell Components [-20%] 
        Must say "safe" in Old Goblin 
        Must gesture with hands 
Levels 2+ [+8/level] 
    Increase Create by 1 level [+40 base]