The title the Abyssal is unlocked by clearing at least 20 waves on the Bronze difficulty or higher of Rush of Blood.
This title changes according to the language of the server on which RuneScape is played, as shown below:
||Der schreckliche [Name] / Die schreckliche [Name]
||[Name] l'Abyssal / [Name] l'Abyssale
||[Name] o Abissal / [Name] a Abissal
|The update history project is a work-in-progress – not all updates to this topic may be covered below. See here for how to help out!