In Mortal Shell 2, the Gracius shell is a powerful combat shell. To obtain it, you must first complete the special quest given by the tavern NPC. Additionally, you need to acquire the Berserker Stone, which is located in the Vatra Temple. If you take the Vatra Star and leave before obtaining the stone, you will not be able to get it again.
How to Obtain the Gracius Shell in Mortal Shell 2