But as you continue your journey and level up, you'll notice more hidden chambers scattered across Midgard -- and at the center of each is a secret ultra-hard Valkyrie that will test your prowess in the end-game phase. There are three that aren't in hidden chambers, which we'll get to in just a second. But before we start in earnest, there's one thing you should know. How to Unlock God of War's Valkyries Before accessing any of the God of War's Valkyries, you need to first obtain the Magic Chisel. This occurs normally during the course of the story when a new area is opened after the scene with Mimir and the World Serpent, so if you don't have it yet, just continue the main story quest. With the Chisel in hand, you can go back to the hidden chambers and unlock their seals to tackle the Valkyries for the Prove Your Valour quest and ultimately, the Chooser of the Slain trophy. god of war valkyries After defeating eight Valkyries, you'll need to take their heads to the Council of the Valkyries to battle the ninth. Besides finding the Valkyrie bosses to defeat, these locked, hidden chambers also frequently have the flying around in trees. How to Find Geirdriful Location: Foothills -- Hidden Chamber of Odin To find this hidden chamber, head to the east through the fields of poison from where you first meet Sindri. However, turn left at the path to find a cave where the chamber is located. When fighting this enemy, be sure to use the quick-turn ability to evade this Valkyrie's blinding shockwave and be prepared for lots of long-range projectile attacks. Patience is key to this fight, with you most likely turtling up more than attacking. Foothills Valkyrie Location How to Find Olrun Location: Alfheim Lake Of Light -- Hidden Chamber of Odin Head to the western beach at the Lake Of Light and go to the right of the dock to find the hidden Valkyrie chamber. This Valkyrie evades attacks god of war valkyries crazy and will need to be hit with arrows while in the air, so make sure to rely on Atreus. Also, be on the lookout for a quick attack to arrive at the end of the boss' evasion move. Command Atreus to launch shock arrows when this Valkyrie takes to the air and be on the lookout to evade the wing combo attack which can't be blocked with your shield. Thamur's Corpse Valkyrie Location How to Find Eir Location: The Mountain -- Hidden Chamber of Odin You'll find this one in the Mountain mineshaft, the area with the giant metal claw on your way to the summit. Head to the far right side of the area near a big pile of rubble to find the hidden chamber. This Valkyrie is entirely focused around defense, so you need to use the block breaking ability to get damage through without being counterattacked. Travel the light bridges toward the Nornir chest, then destroy the area up on the left ledge with the exploding red sap door. Head through the cleared area to find the hidden chamber. This Valkyrie summons a bunch of Draugr to fight you, but if you keep at least two around, she typically won't summon more. Witch's Cave Valkyrie Location How to Find Rota Location: Helheim -- Hidden Chamber of Odin On Helheim's final bridge, turn toward the west and have Atreus shoot an arrow at the red sap doorto god of war valkyries the area to the hidden chamber. There will also be a Raven and Artifact just inside, as well as another Artifact behind the left-most brazier just before the boss area. You need to be nimble here to block the devastating grapple attacks and long-range chakram throws from this Valkyrie. Gondul is can be found after completing the trials and making it to Arena 6. Muspelheim Valkyrie Location How to Find Hildr Location: Niflheim In Niflheim, head down the left-hand path and be on the lookout for a cave on your left side in the second room with a chest. When Hildr sends out projectiles, block the first few and then sidestep the final one, which can't be blocked. Don't bother with the frost axe -- it won't hurt this ice-focused Valkyrie. Niflheim Valkyrie Location How to Find Sigrun Location: Council of Valkyries To find and battle the ninth Valkyrie -- actually the queen of the Valkyries -- you need to first kill the other eight and bring their heads to the Council Of Valkyries. Move up the ledge by the giant boats and then go down the path in the cave to a big set of wood doors. This boss has much more health and additional attack types than its compatriots, so get ready for a long, brutal battle where strategy is mightier than the sword.