'''{{PAGENAME}}sAsphyx Shells''' were weapons used by the [[Thousand Sons]]. Tainted with a psycho-reactive toxin of unknown origins, the Thousand Sons were able to arm their eliteswith these unusual and highly lethal munitions. These shells were first believed to have been developed on[[Prospero]] for use with relatively primitive projectile weapons made to defend against the [[Psychneuein]], butthe difficulties of mass production and scaling of their effect limited their deployment.{{Fn|1}}

*{{Endn|1}}: [[The Horus Heresy Book Seven]] pg.210