Radioactive Blue
From MHWiki
Radioactive Blue cheese (often referred to simply as RB) is a special type of cheese that cannot be purchased but instead must be created by using a Radioactive Blue Cheese Curd Potion or Greater Radioactive Blue Cheese Curd Potion (which are dropped by mice in the Lab and Mousoleum) on SUPER|brie+ (for free) or Brie (for a small cost). Occasionally Radioactive Blue can be obtained as loot from Lycan mice.
It is used primarily in the Mousoleum as the mice it normally attracts are only found in that location.
