The Artifact Box:

The owner of this wonder, or anyone they allow, may at the start of a session deposit or withdraw artifacts from this wonder. There are five artifact slots that will not be lost on character death, and increase the difficulty of them being stolen by one tier. This is also one additional elite slot that cannot be lost on character death, or era transition. Additionally, it increases the difficulty of the artifact being stolen by two tiers. Artifacts in storage may not be used but may be upgraded at moderately decreased chances of success. Only one Mythical artifact can be stored in The Artifact Box at a time. Normal Storage: (2/5) 1. 2. 3. 4. 5. Elite Storage: (0/1) 1. Obsidian Egg