Succubus · Hall of Mirrors

Go to Belmont Manor in Hall of Mirrors and progress the Succubus battle. Clones will still fire volleys after getting into position; the projectile attack ending inside the shield does not mean the shield has broken. Clear all shield clones, then deal damage only after seeing the shield break and the main body land and pause. After the battle, interact with the reward orb to obtain Life Drain. Only after absorption is complete is this prerequisite met for the story event to receive Mirror Walk from Eleanor in Holy Innocents' Cemetery.