Mission 7 - Pieces of a Mirror | Piles of Sacrifice and Dungeon Keys - First pass Castlevania: LoS 2 Guide

#7 Pile of Sacrifice and #4 Keyhole for a Dungeon Key

Ledge leading to a Pile of Sacrifice.

After regaining control, don't go towards the castle (ahead), but turn around and go to the device. Destroy the ice blocking the device with a Chaos Bomb, and then pull the lever. Pass through the bars blocking the way and go through a tunnel on the right side.

Stand on the edge and jump on a small stone ledge - behind the bars you will find a Pile of Sacrifice, which will award you with another Kleidos' Nail. Ignore the further part of the tunnel (as you lack a skill necessary to get there), jump down from the ledge, and then get inside the tunnel on your right side.

A tunnel leading to a keyhole for a Dungeon Key.

After entering the tunnel, go to the right, where you will find two Pain Boxes (with a Void and Chaos Gem inside). After collecting both gems, go to the right part of the tunnel, where you will find a keyhole for a Dungeon Key (you were here during the Buiquimek Corporation mission, but you didn't have any keys on you at that moment.

#5 Keyhole for a Dungeon Key

The upper climbing route leads to a keyhole for a Dungeon Key.

Get outside and hop on a wooden bar to start climbing - after getting to the crossing, move all the way up to reach a place with a keyhole for a Dungeon Key (again, you will receive 2,000 points of experience for unlocking it).