If used on a Skeleton prior to animation, then the resulting undead will have the Body of Metal Meta-Trait (use DR 9; do not add skeleton and metal DR) and Fragile (Brittle) should be removed. This is often used to make bone weapons and armor.

Create (Steel, Small Category) 1 [14] 
    Cosmic (Retains Original Appearance and Size) [+50%] 
    Ranged (Gaze) [+40%] 
    Reduced Fatigue Cost 1 [+20%] 
    Based on Activation Roll [+5%] 
    Transmutation (Bone to Steel) [+50%] 
    Transmutation Only [-100%] 
    Magical [-10%] 
    Spell Components [-20%] 
        Must say "steel" in Latin 
        Must gesture with hands 
Level 2 [27] 
    Increase Create by 1 level [+10 base] 
Levels 3+ [+13.5/level] 
    Increase Create by 1 level [+10 base]