Complex sentence: Attempting to use himself as a test subject, Richtofen accidentally teleports to a catacomb within the moon, where he comes into contact with a mysterious pyramid device that causes him to have schizophrenia, slowly taking away his sanity.
Split into simpler sentences: Attempting to use himself as a test subject, Richtofen accidentally teleports to a catacomb within the moon. He comes into contact with a mysterious pyramid device that causes him to have schizophrenia, slowly taking away his sanity.