Brimstone key

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Brimstone key detail.png

The Brimstone key is a key obtained from killing monsters while on a slayer assignment given by Konar quo Maten. It is used to open the brimstone chest.

The exact odds of receiving the key scales with the monster's Combat level. For level 100 or higher monsters, the odds are between 1/100 and 1/50, scaling linearly and capping at level 350 (-0.2 * lvl + 120).[1] For monsters lower than level 100, it follows a curve (0.2 * (lvl - 100) ^ 2 + 100).[2]

Visualization of brimstone key drop rate curve

Trivia[edit | edit source]

  • The symbol on the key is that of Yin and yang (“阴阳”/“陰陽”), which, in Chinese philosophy, are the two "primal" elements which create, shape, and influence everything in existence and have to be kept in balance. This references the philosophy of the Kahlith and their masters, the Tasakaal, which is to maintain the balance between life and death.

References[edit | edit source]

  1. Jagex. Mod Kieren's Twitter account. 16 January 2019. Mod Kieren: "It follows a curve up until level 100 then scales linearly between those 2 values upto level 350 combat. Creatures over thsi[sic] will cap at 1/50. [1]"
  2. Jagex. Mod Kieren's Twitter account. 16 January 2019. Mod Kieren: "0.2*(CBLEVEL - 100)^2 + 100"