In Assassin’s Creed Valhalla (ACV) you must get Thor’s Helmet for the Godly Reward trophy and achievement. This guide explains how to unlock Thor’s Helmet.
First you must defeat the 3 Daughters of Lerion and then use the swords you got from them to open a secret passage. The Daughters of Lerion are 3 powerful witch enemies. You will need to level up a bit to stand a chance. Level 300 is recommended for the last one, but on easy difficulty you can defeat her at about level 150 if you are good with parries. You can change the difficulty to easy in the gameplay options for these fights. The basic strategy is to dodge the red rune attacks and parry all other attacks (press Block-Button just as the enemy lands an attacks). Then do a counter-attack combo and repeat.
Step 1: Defeat 3 Daughters of Lerion
One is found in Grantebridgescire, two are in East Anglia.
Step 2: Open Secret Underground Passage
In East Anglia, head to the cave entrance marked below:
Reach the end of the cave and you’ll come to a Statue that looks like the Daughters of Lerion. On its back are 3 slots where you put in the swords they dropped.
Enter the 3 swords and the statue will go away, revealing a hidden staircase that leads to a Wealth Chest. Thor’s Helmet is in that chest.
This is what Thor’s Helmet in AC Valhalla looks like:
For more guides check out the complete Assassin’s Creed Valhalla Wiki & Strategy Guide.