The moat surrounding the inner castle of the Dark Temple could even be described as a small lake. The surface width was greater than the outer moat. At the top of that two hundred meter hill was the immense fortress, its highest point reaching a full hundred meters. Covered entirely in black and even emitting a faint black glow, it was evident that the building materials of this fortress differed from the constructions outside. Such a heavy and oppressive feeling greatly astonished the Saints of Heavenly Stem; what could this structure be made of?