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Silica-virae
From Warhammer 40k - Lexicanum
Silica-virae were ancient monstrous weapons, that scoured away nanites and were later used heavily by the First Legion during the Great Crusade.[1]
They were pronounced as the ultimate heresy by the adepts of Mars and none but the Dark Angels were able to use the Silica-virae. However unleashing such weapons served only one purpose: the utter destruction of life on a world.[1]
Source
- 1: The Horus Heresy Book Nine - Crusade, pg. 110
