Radioactive Blue
Radioactive Blue cheese (often referred to simply as RB) is considered to be the most advanced of its kind. It was created one day by mistake when a worker at the Laboratory accidentally knocked a container of radioactive isotope Bromice Verminium onto a plate of SUPER|brie+ . He noticed that mice in the lab were scratching on the glass of their cages soon after, so he did some tests. Sure enough it was discovered that this new cheese was amazing in its properties. It could attract all sorts of mice that were no longer living.
Radioactive Blue 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). It is used primarily in the Mousoleum due to its amazing supernatural attraction. Occasionally Radioactive Blue can be obtained as loot from Lycan mice.