Muspelheim is one of God of War’s optional realms, and you’ll need to gather four Muspelheim Language Ciphers to unlock it. You’ll also need to learn the language of Niflheim in order to unlock the ‘Trilingual’ Trophy on the way towards your Platinum. Once you’ve accessed Muspelheim from the World Tree, you’ll encounter five combat trials which lead to a Valkyrie. Each combat trial has a Normal and Hard tier to it, but upon beating the Valkyrie in Muspelheim you’ll unlock Impossible variations of all five combat trials. Completing three of the five will earn you three keys, which you can then use to unlock the sixth and final combat trial. You need to complete this final combat trial to unlock the ‘Fire and Brimstone’ Trophy.
How to Learn the Language of Muspelheim and Unlock the Realm
There are four Muspelheim Language Ciphers that you’ll need to collect in order to learn the language of Muspelheim and unlock the realm via the World Tree, which is the golden dome-like arena in the middle of the Lake of Nine. Similarly, you’ll need to learn the language of Niflheim to access that realm as well, and you can find out more about how to do that through the link
Muspelheim Language Ciphers can be found inside purple cipher chests which are distinguished by a face decoration on their front. You open them like any other chest in the game, and they can’t be missed, so you can come back and collect and open them at any time.
God of War Muspelheim Language Cipher Locations
Here’s where to find all Muspelheim language ciphers in God of War:
|Region||Muspelheim Language Cipher Chest Location|
|The River Pass||Behind the elevator in the lower level of the Witch's Cave is some red tree sap that you can detonate with Atreus arrow. Once you've cleared it out, solve the puzzle to open the door in this area. The Muspelheim language cipher is in the purple chest on the other side.|
|The Mountain||It's almost impossible to miss this one as it's part of the main story path. Just follow the route from the Mystic Gateway named 'The Summit' and the purple chest with the Muspelheim language cipher will be right in front of you at the top of a staircase.|
|Cliffs of the Raven||To the east of the Lake of Nine is the Cliffs of the Raven region. Defeat the dark elves then boost Atreus up to the second level. Command him to drop the golden chain and climb up to it for the purple chest.|
|Forgotten Caverns||The Forgotten Caverns is in the western area of the Lake of Nine. You'll find the chest near to the southern dock point, not far from the Mystic Gateway.|
How to Complete All of the Trials of Muspelheim in God of War
Once you’ve travelled to Muspelheim in God of War, you’ll reach the first of five combat trials which can be activated by interacting with the sword in the centre of the stage. Each of the five combat trials has a normal and hard variant to begin with, making for a total of ten trials. Complete all of these and you’ll reach a Valkyrie, and you can learn more about how to beat Valkyries through the link.
Upon beating the Valkyrie you’ll unlock the sixth and final combat trial, but this requires three keys. To collect the keys you need to return to three of the previous five combat trials and beat them. You only need to do three; the easiest ones are probably Combat Trial 2, Combat Trial 3, and Combat Trial 5, but it’s up to you. Note that you only need to complete three of the five trials on Impossible to get the keys.
Once you’ve got the keys return to the Valkyrie area to start the sixth and final combat trial. You’ll need to kill 50 enemies within eight minutes. Finishing this will unlock the ‘Fire and Brimstone’ Trophy.