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Or [[Zoat]]s. A centaur-like race aboard "[[Hive Fleet Colossus"]]. Bore many similarities to other Tyranid hive fleets, but had obviously encountered unique environs and thus evolved differently. Chief among these strange traits were their ability to make use of normal Tyranid weapon-symbiotes (although it seems that the process of equipping themselves with these bio-armaments is quite painful), and the unique talent of communicating telepathically with other organisms. Although the Colossi claimed to be slaves escaping some unnamed oppressor, these aliens turned on Imperial forces. Thus began the xenocidal 50-year Zorastra-Attila wars that ended with the destruction of the entire Hive Fleet Colossus.