novel zodiac
It's a ghost with black hair and withered, torn clothes. Every footstep you take allows them to move 2 blocks closer to your direction. Every second of voice allows them to traverse 5 blocks. Door opening/closing and that's 7 blocks. If you don't move or talk, it'll whisper, every 4 seconds of whispering is 2 blocks closer. This can also kill those being too loud in cabinets. You can use drums and note blocks to lure the monster slightly closer every hit. Constant music is the best lure. If music plays, it'll try find the source before turning it off. If it can't, it'll scratch at the speakers. If it can't it'll cover its ears in shame. Any collisions against the monster results in death. This could be on room 6+
bold elk
high nebula