Chimera: The Chimera,as the name implies,is a mix of species,specifically a Drell and Hanar,that have been converted by the Reapers. This particular creation has the lower limbs of a Drell and the upper body of both Drell and Hanar,bar the limbs of the Drell. With this configuration,this hybrid bypasses a Hanar's natural inability to move on land by giving the creature the agile limbs of a Drell,allowing quicker movement. However,the added weight hinders this abomination's ability to effectively leap and jump,limiting it to accessible ramps and walkways. Due to the lack of the Drell's arms,the tentacles of the Hanar are used instead for grappling with oppnents or spraying them with a neurotoxin that surpasses even that of a Shade or Ceph.
This looks more like something I'd encounter in Dead Space. You know, you got me thinking. What if a Reaper encountered a marker? Reaper succumbs to the marker and begins making necromorphed reapers. I can't even wrap my head around the idea.