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 Chests in Catacombs Master Floors 3-6. The floor they drop in is 2 higher than the tier of star it is. They're relatively profitable if you can do runs efficiently

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. They take experience levels to apply.