Use these plate keys to get various items from the machine in the alchemy room . The alchemy room is the room in the holes throughout the game. This machine will only appear after you have beaten the game once.
ADAMAS - Diamond Choker MORGAN - Alchemist Earrings POWDER - Burst Shoes ALCHYMIA - Fairy Earrings MAGNUS - Inqisitor earrings and Jade choker
To unlock both hard mode and the secret room beat the game once, these will then be selectable from the main menu.
