When will Slayer be officially released?
Current in-game combat level is 23. So I don't know if Vannaka works. But all I know is that the level 1 Slayer Master at Burthorpe does not work, even the trade option.
I am a huge fan of slayer, if the name didn't give that away already. +30M Slayer on RS one account, 60m+ in total.