@@user-uf8jc3mg2p allow me to explain, so first you need a crucifix, it can be found rarely or can be purchased on door 52, once u have it, go to a dark room, wait for screeches psst, (keep the crucifix hooded for 2-3 secs) and now that black rat with tentacles won't bother u anymore!
also tip:if you use crucifix on seek dont just stand bc they can escape from the crucifix so if you use it on him and run as far as you can he will have less time to catch up