Collecting materials to summon Tormented bosses is one of the critical gameplay loops in Diablo 4's endgame. With the release of Vessel of Hatred on October 7 and 8, players can transmute summoning materials from «lesser» Tormented bosses into summoning materials needed to summon Tormented Uber Duriel and Tormented Uber Andariel.
VoH Release Patch Notes Uniques Target Farming Guide
In addition to «lesser» summon materials, players will also need Khazra Horns, which drop from lesser Tormented bosses, and in the Dark Citadel, Vessel of Hatred's new endgame raid dungeon.
Below, you can find all boss summoning material transmute recipes available at the Alchemist in Vessel of Hatred:
Transmute Mucus-Slick Egg
Transmute Shard of Agony
Transmute Sandscorched Shackles
Transmute Pincushioned Doll