 SCP-077 appears to be the top half of a human skull, engraved with runes, each filled with an unidentified black resin. If these engravings are not read aloud at least once within a 24 hour period, the eye sockets and nasal cavity of SCP-077 will emit SCP-077-1. SCP-077-1 is a luminescent green vapor, whose precise nature remains undetermined. It is to be noted that, although SCP-077-1 behaves as a normal gas in all other ways, it only occupies those spaces which are within SCP-077's effective line of sight, and does not flow into the space behind SCP-077 unless confined.