At last the time has come to continue the Plague City story in this long-awaited sequel, Mourning's Ends Part 1. It seems at last Arianwyn has found a use for your skills. Talk to Eluned, the roving elf, and she will show you the way to the Elven village of Lletya where Arianwyn awaits your arrival.
For those of you who need a recap on the story so far, a chat with Elena after you start the quest would be very helpful.
Guthix, in his wisdom, has decreed that the Tears of Guthix shall henceforth be able to help adventurers gain Farming xp.