Can't get into the boss room at Kerguelen Plateau?

[Clegane]

Hello,

I just found the "Aether wings" which is popping up as required when I get close to the boss room in the Kerguelen Plateau (Third ice area) and for some reason the door is locked, even though I have the ability to double jump now.

How do I unlock the boss door? Is there something else that i'm missing?

[Omegatherion]

There is a hint in the room near the door. A piece of lore to read for you.

You need ti collect two Lilly of the Valley to get to the boss

[Clegane]

Nevermind, you need to go ahead and explore the third area and find something called "Lilly of the valley" which are hidden around the third biome.