Upgrading SpellsДЄfter collecting the charm, drop down into the bottom of The Abyss and go west into another section. If you miss the Arcane Egg and chose to obtain the charm first, you won't be able to acquire the egg and even re-enter the room. Upon acquiring the charm, The Knight will lose consciousness and wake up at the entrance of the lifeblood door which has now turned into a grey color. Drop down into the left side first to find an Ancient Egg that you can sell to Relic Seeker Lemm for 1200 Geo, then head east where you can find the Lifeblood CoreВ charm sitting on top of an altar. Make your way through the spiked cavern and then stop once you reach the platform that has a path that you can either drop down to the left or right. The door will then open after the last orb lights up.

Simply approach the mechanism in the middle and wait for the orbs to light up one by one. Upon entering, drop down about midway into The Abyss towards your left where you'll find a locked door covered in blue vines and petals. Just make sure you don't take any damage while heading to The Abyss. But in order to open the door, you'll need to use a bench then equip the Lifeblood Heart and Joni's Blessing charms in order to obtain 15 Lifeblood Masks. There is a charm that you can acquire in this area which is the Lifeblood CoreВ charm. Once you've arrived, approach the door and it will open.

At this point, you should have acquired the King's BrandВ after fighting HornetВ for the second time in Kingdom's Edge. To return to the entrance of The Abyss, you'll have to make your way back to the Ancient Basin.

Hollow knight abyss blue door