Magma mutagen

Magma mutagen
Released							30 April 2015 (Update)
Members							Yes
Quest item							No
League region							Tirannwn✓
Properties
Tradeable							No
Equipable							No
Stackable							No
Noteable							No
Options							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
Link							MOID

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.

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.^[1]

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.

v t e Zulrah
Monsters	Zulrah Snakeling
Signature drops	Zulrah's scales Jar of swamp Pet snakeling Zul-andra teleport Serpentine visage Fangs Tanzanite Magic Mutagens Magma Tanzanite
Equipment	Toxic blowpipe Toxic staff of the dead Trident of the swamp (e) Helms Serpentine Magma Tanzanite
Other	Strategies High Priestess Zul-Harcinqa Priestess Zul-Gwenwynig Anti-venom Anti-venom+