Changes

*¹The planet of '''Simia Orichalcae''' is mainly an [[Ice World]], uninhabited except for [[Promethium]] processing plants scattered across the planet to refine veins of rare ice, deep underground, into usable promethium.

^a==Etymology==

^bIt is, however, most notably featured as the planet where [[Commissar]] [[Ciaphas Cain]] along with the [[Valhallan 597th]] were deployed to defend a promethium refinery against marauding bands of [[Orks]], ^cand later encountering [[Necrons]] after [[released from stasis by the presence of sentient life. ^dIt is later revealed that high-ranking Adeptus Mechanicus]] magi unwittingly activated a Necron Portal leading to a Necron [[Tomb World]]. Commissar Cain attempted to destroy the Necron warp portal with [[melta bombs]], but initially failedmagus, in desperationErnulph, he filled deliberately built the deep underground caverns beneath refinery exactly above the processing plant with promethium from a reserve and "got the frak out of there"Necron Tomb to investigate it.

^eCommissar Cain attempted to destrtoy the Necron Tomb, along with a Necron warp portal with [[melta bombs]], but initially failed. ^fIn desperation, he filled the deep underground caverns beneath the processing plant with promethium from a reserve, with the help of Adeptus Mechanicus magus, Logash; and "got the frak out of there".  ^gThe [[Imperial Guard]], realizing that they could not defeat an endless wave of foes (noting their apparent indestructibility without the help of an [[Astartes]] [[Chapter]]), in addition to Orks in the company of a Gargant; promptly chose to evacuate the mining colonies to an awaiting ship, the [[Pure of Heart]].  ^hFrom there, they detonated the promethium-filled caverns with bombs placed by sappers originally meant for the approaching Ork [[Gargant]]. The blast was so powerful that shockwaves were felt throughout the already spaceborne Pure of Heart, and left a kilometers-wide crater that permanently scarred the pristine icy-beauty of Simia Orichalcae.

*¹[[Ciaphas CainCaves of Ice]]:[[Caves of IceCiaphas Cain (Novel Series)]] Omnibus by [[Sandy Mitchell]]**^a: pp. 295**^b: pp. 295-298**^c: pp. 352-354, 390-393, 411-418**^d: pp. 424-431**^e: pp. 454-455**^f: pp. 467-468**^g: pp. 468-469**^h: pp. 474-478