Once a thriving Eco-Dome on Hive Secundus, Biodome XII specialised in imported flora and fauna from across the Imperial influence and rich citizens of Necromunda and even some visiting the planet would seek out the Eco-Dome to see its wonders; a jewel in Necromunda's crown. Biodome XII was tended by Dometender Erica Von Butal of the Von Butal family and was highly praised for her work and collection, however this would be her downfall, when the genestealer infestation was discovered over a century agoin and Lord Helmawr ordered for Hive Secundus to be quarantined, irradiated and grav bombed to drstruction, Erica stayed to defend her plants and animals. In her spasm of madness, she sealed off her Eco-Dome, trapping her attendants inside with her. There they observed through the glass structure of Biodome XII, the destruction of Secundus and the collapse of the spire and subsequently the creation of the Secundan Abyss. Through the force of the blast and the shifting of the ground, the glass dome cracked and broke, exposing the attendants, Erica and the plants and animals contained with Biodome XII to massive amounts of radiation. In the human denizens, this lead to an immediate and painful end as they experienced their cells mutating and burning up before they passed out through shock, but, surprisingly the plants and some of the animals survived being, originally, from hostile habitats themselves. The animals appeared unharmed by the radiation and the plants appeared to begin to come alive, unknowingly to Erica and Imperial scholars, having been made dormant through the removal and transfer of them from their home plant to here. The now active parasitic plants, took over the bodies of Erica and her attendants sparking their consciousness once again, giving the facsimile that they're still alive and have survived, but they are very much dead. Twisted plant/human mutants being made to tend their gardens once again.