Mission 10 - The Mirror of Fate | Piles of Sacrifice and Dungeon Keys - First pass Castlevania: LoS 2 Guide

#9 Pile of Sacrifice

To the left there's a Pile of Sacrifice, and to the right there's wooden scaffolding allowing you to climb up.

Ignore the hole behind you and climb up a wooden scaffolding on the right side of the room. From there you can jump on a ledge on the other side of the room, where a Pile of Sacrifice is located. Use your double jump to get there and collect a Kleidos' Nail.

#8 Keyhole for a Dungeon Key

Behind this gate, there's a keyhole for a Dungeon Key.

After getting to the other side through the first cooperative puzzle, a bridge will be raised and your ally will join you. Another puzzle awaits you, but before you enter it, go through a corridor towards the closed door and turn right - behind the bars you will find a keyhole for a Dungeon Key.