Infineum rings and talking books make for the most delightful of adventures.

At level 21, Scholar Donovan will offer the next quest in Vanguard's
Coterie Infineum Sanctuary Line: Infineum Immunity. This quest will
ultimately result in an infineum ring. In the first part of the
mini-series, we discover the infineum library, a talking book, and a
sinister ritual the miners have been performing to give themselves
immunity to the toxic infineum.

Head back to Scholar Donovan and hail him. He'll have more
information about the infineum. He'll explain that the ore had trace
amounts of power, stemming from "an ancient being" that was slain years
ago. Donovan thinks that the infineum formations in the mines are the
crystalline manifestations of the blood of that being, and that it would
be very dangerous if that were the case.

Read the full guide at Ten Ton Hammer's VG site.