Certain quests, that are marked out, may be locked or unlocked by saving /sacrificing Archfiends indicated by the arrows in the menu. To unlock this pact, you need to fight Magusar, and win the fight.
Quests[]
Sacrificing Illecebra
Saving the Illecebra
Quests (Cont.)[]
Sacrificing Cerberus
Saving Cerberus
I. Innocence· II. Desire · III. Reparation · IV. Atonement · V. Envy · VI. Pride · VII. Judgment · VIII. Remorse ·
IX. Penitence · X. Recursion · Forgotten Pacts |