Magma mutagen

Magma mutagen
Released							30 April 2015 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							No
Equipable							No
Stackable							No
Destroy							Drop
Examine							Triggers mutation in a serpentine helm.
Values
Value							9,500 coins
High alch							5,700 coins
Low alch							3,800 coins
Weight							0.05 kg
Advanced data
Item ID							13201

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

Item sources

For an exhaustive list of all known sources for this item, see here (include RDT).

Source	Level	Quantity	Rarity
Zulrah	725	1	2 × 1/13,106

Drop rate

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 (10/248) and the chance of rolling the mutagen table (20/5,264). Both mutagens are equally likely.

Thus, multiplying these three fractions will result in ~1/6,553, which is the chance of either mutagen per roll, or a ~1/13,106 chance for a specific mutagen. However, since Zulrah gives two rolls to its drop table per kill, the chances are roughly doubled, giving a ~1/3,277 chance for any mutagen or a ~1/6,553 chance for a specific mutagen.

Changes

Date	Changes
25 July 2019 (update)	The drop rate was slightly increased from ~1/6,580 due to crystal weapon seeds being removed from Zulrah's drop table.
22 November 2018 (update)	The drop rate was slightly lowered from 1/6,553.9 per kill as crushed nests were removed from Zulrah's drop table, due to changes in how the drops are now rolled.