Morgath, Lore-Keeper – Essence of the Feast
To obtain the Essence of the Feast you have to defeat Morgath, Lore-Keeper. Morgath is part of the final fight against the Undying Mind. Select the special version of this strike and play until you reach the bossfight against the mind. Shoot down the boss to trigger the second reinforcement wave, with this wave, Morgath appears and you have to be fast enough to kill him before the Vex kill him. If you fail, restart the bossfight. You get the Essence of the Feast automatically after you kill Morgath.