12/3/14 - SCP077, "Rot Skull"
SCP-077 appears to be the top half of a human skull engraved with runes, each filled with an unidentified black resin. The runes change every lunar month (defined by the full moon rising above the horizon in Ireland), as well as at the winter and summer solstices, the spring and autumn equinoxes, and whenever a partial, annular, or total solar or lunar eclipse is visible from Ireland.
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. Opaque impermeable barriers with no biological content can provide temporary protection from SCP-077-1; however, attempts to permanently contain SCP-077 within opaque containers have failed, due to the artifact's production of sufficient quantities of SCP-077-1 to explosively rupture these containers.
All biological material (with the obvious exception of SCP-077 itself) which comes in contact with SCP-077-1 is instantly transformed into a viscous, malodorous ooze; the ooze has been identified as the rotted flesh of potato tubers (Solanum tuberosum) which have been severely infected with the potato blight (Phytophthora infestans). One (1) cubic centimeter of SCP-077-1 transforms upwards of eight hundred (800) grams of biological material.