I wanted to propose a possible change to the visual effect of the ghost effect costume stone. It feels too constricted (if that makes sense?) and covers the sprite too much. I think there are a few other options that aren't as crowded visually:
EDIT: Apparently these didn't save as gifs when I was pasting them, so I mean you can check ratemyserver.net and view the sprite visuals.
First: 
Heart Hunter Evil. Essentially a single tiny ghost that swirls around the character.
Second: 
Lord of the Dead. Multiple ghosts but they are more transparent and flow outward instead of inward.
Third: 
King Tristan III. 3 swirls that turn into ghosts and flow out away from the character. (Zombie Slaughter also shares the same effect)
