"Crack!" The sky above the Titan Islands began to shatter, causing transparent fragments to fall! However, looking through the gaps left by the falling pieces, the sky was still blue and unchanged. It was not a piece of pitch-black void.
"Huh?" Muria was a little confused at first. He understood that the sky could extend infinitely and wasn't supposed to have a physical form. He believed the cracks in the sky were due to the sun-like existence tearing the space, causing a space rift.
But when pieces of the sky actually began falling, Muria realized that it was not a space rift. The falling particles were not space debris either. The small semi-transparent pieces, which continuously emitted faint flashes of spirit light, were energy crystals.
"A gigantic puzzle barrier," Muria judged based on the books he had read over the years when he saw what was happening. He was not reading those books for nothing.