The way to obtain Baldur's Helm in Baldur's Gate 3 is to complete the main mission step by step. After completion, you can obtain it. You can quickly obtain it by searching on different platforms.
The first is to enter the location of the entrance to Feilongyan Fortress after Daventon according to the main plot.
Then use the levitation technique on the platform in the picture below to jump the character to the stone wall on the right, and follow the direction of the arrow.
After moving to the ground, use the levitation technique to jump straight down.
On the left side of the ground, you can see a pipe, which is the mouse hole leading to Feilongyan Prison.
In Feilong Cave, players are required to complete the challenges of four rooms.
Between Courage: Destroy all Teijin in the room within a limited time.
Between Justice: Kill the correct staff officer, the first one on the left is the one.
Between Insights: Use the light of the moon to reveal the paintings in the prison, and then place them in the grooves.
Between strategies: You can successfully pass this level by playing chess normally.
To complete these four challenges, you must defeat the Anzu Dragon and obtain Bodean's Giant Killer weapon.
On the platform behind you can see a helmet, this is the Helm of Bodrian.