Mission 11 - Revelations | Piles of Sacrifice and Dungeon Keys - First pass Castlevania: LoS 2 Guide

#10 Pile of Sacrifice

Memorial, and to the left you can find a Pillar of Sacrifice.

After regaining control over your character, get out of the arena and go to the right - you will find a Memorial and Pile of Sacrifice (increasing amount of Dodo Eggs you can carry to 4) there.

#9 Keyhole for a Dungeon key

On the other side of the same room in which you activated the Pile of Sacrifice, you will find a keyhole for a Dungeon Key.