Litany of the Dead Part 4

Litany of the Dead Part 4 (or Accursed Ascension) is a story arc given out in the Necropolis.

Required quests

 * Desecrated Temple of Vol
 * Flesh Maker's Laboratory
 * Inferno of the Damned
 * Ghosts of Perdition

You must gather 8 Sigil pieces through these quests to gain access to pre-raid. The numbers are the positions of the piece in Sigil: Frame (left to right).
 * Right Wing (1) drops only at Desecrated Temple of Vol.
 * Left Wing (2) drops only at Flesh Maker's Laboratory.
 * Right Frame (3) drops only at Inferno of the Damned.
 * Left Frame (4) drops only at Ghosts of Perdition.
 * Left Pincer (5), Center Frame (6), Eye of the Abbot (7) and Right Pincer (8) can drop from all 4.

Pre-raid

 * Litany of the Dead

You must defeat 4 named bosses in this quest to gain access to the Black Abbot raid.
 * Cinnis (Cinderspawn)
 * Cholthulzz (Doomsphere)
 * High Priest of Vol (Vampire)
 * Mentau (Golem Maker)

The Black Abbot raid

 * Ascension Chamber