The Crimson Agate is an Adventure Item which can be found in the Dragonspine area. Crimson Agates can be offered to the Frostbearing Tree in Dragonspine for rewards, similar to the Statues of the Seven and the Reputation system. They can be found scattered in the overworld, in certain chests, or as a repeatable reward from completing a Crimson Wish. Chests that contain a Crimson Agate have a dark red aura surrounding them.
When an overworld Crimson Agate is within close proximity of a player, an icon will appear on their mini map along with a sound effect, like with other elemental oculi. However, chests containing a Crimson Agate do not appear on the mini map. Additionally, Crimson Agates lack a corresponding resonance stone to direct a player to their general location.
80 Crimson Agates can be found in the overworld or in chests, allowing a player to raise their Frostbearing Tree's Offering Level from Level 1 to Level 9 before completing any Crimson Wishes, which are unlocked at Level 8.
See the Teyvat Interactive Map for locations.
When the nail that froze Dragonspine descended, the trunk and canopy of this tree shattered into many fragments that were then frozen. A long time later, a black dragon fell into the valley and its blood seeped into the ley lines. And a long time after that, someone has broken the icy shackles, and the ancient tree that has absorbed that "crimson" has now sprouted anew...