shirt designed to ward off evil

Exploration Stage: Hall of Departure
From: Martha
Description: Once we realize we've caught ourselves, the devil will try to cast a spell on us. To avoid being affected by his magic, we need to wear funeral shirts. This is an artifact with a connection to the world of the dead, so it should Kyushu Abaddon's magic. Can you help us find it?
Completed: You found your funeral shirt! Here, hurry up and put this on! Yeah, sure, it looks a little creepy, but there's no other way to protect yourself from the demonic magic that was created to lure the living into the underworld.