Complex sentence: Later in the series, her identity was suddenly revealed after she forced herself to remember her the own past, then horrifying images of blood began to flash all over the room, and her mind slowly plunged deeper into corruption.
Split into simpler sentences: Later in the series, her identity was revealed after she tried to force herself to remember the past on her own. Horrifying images of blood begun to flash all over the room and her mind was slowly plunging deeper into corruption.