Mission 9 - The Second Acolyte | Piles of Sacrifice and Dungeon Keys - First pass Castlevania: LoS 2 Guide
Last update: 11 May 2016
#7 Keyhole for a Dungeon Key
Use your Bat Swarm on one of the patrolling guards (the one standing further away from you) to distract him and the one that will arrive to help him, allowing you to get past them to the other side of the room - to get there you can possess the other guard or use Mist to slip near them undetected. After reaching the other side, stand above the grid without the airflow (closest to the elevator) and use your Mist power again to get to the lower level. You will get into a room with a Memorial.
Collect it and use a nearby Shadow Portal and cross the narrow tunnel below ground to get to another room. After reaching it, use a Shadow Portal to regain your form and activate a nearby keyhold with a Dungeon Key to collect experience points.