The illustration I present today was a pitch suggested by a twitter collaborator. It is an elemental vault based on the four elements: fire, air, earth, and water. To access the vault, you have to visit a part of the vault inspired on that element and complete a trial to get a key. The four keys are needed to open the vault's door. I've suggested an orb of dragonkind as an awesome treasure to get at the end of this dungeon. You may put whatever other macguffin you want in the vault.
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