Check your rarity

Every box's rarity was locked at the fire. Its Rarity Rank is out of all 500 boxes, sealed ones included, and it never changes.

Check

Rarest revealed so far

Rarity Rank orders all 500 arts by their Rarity Score (higher is rarer); boxes with the same score share a rank. OpenSea shows its own rank, which counts sealed boxes as missing traits, so it moves every time someone reveals. This one does not.