Master Star

Master Stars are items which upgrade 5-star Dungeon items with Master Stars, increasing their stats within Master Mode. They are obtained from Catacombs Master Floors 3-6.

Obtaining
Master Stars are rare drops from Dungeon Reward Chest in Catacombs Master Floors 3-6(and most likely Master Floor 7 for the fifth, although it isn't released yet). The floor they drop in is 2 higher than the tier of star it is.

Usage
Master Stars can be used in anvils with Dungeon items to change their stars to Master Stars, which appear as red stars at the end of the item's name. Each Master Star grants +5% stats of that item in Master Mode only, along with +10% in both Master and normal mode.