|Released||30 April 2015 (Update)|
|Examine||Triggers mutation in a serpentine helm.|
|High alch||5,700 coins|
|Low alch||3,800 coins|
Item sources[edit | edit source]
|Zulrah||725||1||2 × 1/13,106|
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 (10/248) 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[edit | edit source]
|25 July 2019
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
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.
References[edit | edit source]