Stein with Marie Mjolnir (Death Scythe)
This is true as well, in Naruto their has never been stated to be items that are made of unknown materials.
" @MisterShin: True, but Does that mean it's not made of metal? "
" @Phibrizzo: i believe it was stated to be supernatural but as i dont have the scan handy at the moment ill take your word for it. "you are correct, just remembered it is supernatural sword. I believe it cuts though nearly anything and can extend.
" @MisterShin: Our little biri biri has awesome destructive power, but realistically she only has peak human durability and Speed. If orochimaru gets in close the Advantage swings to him. "Iron Sand, magnetism and Lightning will make close range fine for Misaka, Orochimaru has not show lightning reaction speed.