Tanzanite mutagen

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Tanzanite mutagen detail.png

A tanzanite mutagen is an untradeable item dropped by Zulrah. It allows a player to cosmetically recolour their serpentine helm to a turquoise coloured tanzanite helm. The mutagen is consumed upon use.

Drop sources[edit | edit source]

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SourceLevelQuantityRarity
Zulrah725 Multicombat.png11/13,159

Drop rate[edit | edit source]

The drop rate for this item is calculated from three different rolls: the chance of missing the unique drop table (255/256), the chance of rolling Zulrah's flax table (10/249) and the chance of rolling the mutagen table (20/5,264). Both mutagens are equally likely.[1]

Thus, multiplying these three fractions will result in ~1/6,579.4, which is Zulrah's chance of dropping a mutagen, or a ~1/13,158.8 chance for a specific mutagen.

However, since Zulrah gives two rolls to its drop table per kill, the chances are roughly doubled, giving a ~1/3,289.9 chance for any mutagen or a ~1/6,579.6 chance for a specific mutagen.

Changes[edit | edit source]

Date Changes
22 November 2018
(update)
The drop rate was slightly lowered from 1/6,553.9 as crushed nests were removed from Zulrah's drop table, due to changes in how the drops were rolled.

References[edit | edit source]

  1. Jagex. Mod Wolf's Twitter account. 30 March 2019.