Instructions
Go to the world map and select a dungeon that contains Life Magicite, such as River Belle Path, Moschet Manor or Daemon's Court.
Collect the Life Magicite within the level. It is usually hidden within a chest; sometimes, you will need to fight a few strong enemies to get it.
Gather any elemental Magicite, such as Thunder, Fire or Blizzard. Press the "L" or "R" button to change the arrangement of the Magicite so that the elemental Magicite is in the first slot and the Life Magicite is in the second slot.
Press "A" to cast the Holy spell. Cast it on ghosts to make them visible; this will allow you to damage them with normal attacks.