Twilight was interrupted by a loud explosion that shook the library. Both ponies turned around to see that something had blasted a giant hole in the wall. When the dust from the explosion cleared, on the other side of the hole stood two very strange creatures. One of them was taller than both ponies by at least two feet, and was wearing mostly black. Black hair, black sandals, a black raiment... he even had wings, and those were black as well! The other creature was much shorter, hardly half the size of a pony. He was a small dark blue ball with short arms and legs, wielding a yellow serrated sword, and wearing a mask that covered the entire front part of his body, as well as a cape.