Ok you list orks as always evil and want something to fill that role in eclips phase. I refer you to the D&D 3.5 MM p203 Orc. Second line “Medium Humanoid (Orc)” This line defines a lot about the creature, its size is not relevant now. Its type is humanoid, the humanoid type includes all main book races some of which are usually good. It is the subtype orc that tells you it is a chaotic evil murder machine (since you house rule changed there alignment from often chaotic evil to always evil (and I am guessing often chaotic) The way exhumans are described in the game it is more like humanoid than it is like orc. It is a broad class with many sub classes within it. Exhuman (cerebral) exhuman (predatory) exhuman (genocidal) exhuman (singularity seeker) exhuman (titan hunters). Some of these subtypes are defiantly the type of creature you want. For example if firewall drops a dosea in front of the PCs (apparently the proxy likes the impact of a paper folder hitting a desk) and sais they have unconfirmed reports that a clade of cereberal exhumans may be researching titan artefacts. There is going to be some heavy investigation and the final fait of the researchers depends on what research they are actually doing and whether it can be stopped without killing them all. (you probably won’t run that adventure anyway) Some could even be useful: the proxy informes the PCs “while support for the incursion into the Martian TQZ is minimal there is an underground bunker 30km from the border containing exhuman titan hunters who may be willing to provide hardware.” Now the PCs need to convince a group so alien it is difficult to communicate with that they should hand over some gear. But there are some grounds for working together in the form of a shared enemy. (This you might want to run, it is a short bit of complex social work followed by shooting up half the TQZ, although the error message an empty railgun clip generates may be confusing “please insert teeth”) And of cause the proxy could pull up a hollow image of an exhuman predator and say “a group of genosidal, predatory exhumans attacked a supply ship. The first borders where sickened by the half eaten morphs they discovered that they failed to conduct a detailed inventory. Get out there ASAP and see if they took the 12tones of uranium ore that was on board” naturally they did. “If so you are to track down both the uranium and the exhumans and eliminate this very real threat.” (Hear you have exhumans in the role you want from the start it is abundantly clear that you will be killing them all and eliminating there backups. But the possibility of this scenario dose not make the others unreasonable) One of the things you seemed to want is a single word to induce terror and certainty of justified valance. In EP there are 2: Exurgant, and Titans. So effective are these words that when discussing items connected with one of these threats but not wishing to imply danger on that level people in the setting talk around the issue. “Asinks where infected with warts maclud strain” not “asinks where infected with an exurgant strain” or the fact that most people do not refer to Pandora gates as titan artefacts even though the dominant opinion is that Pandora gates where built by the titans. Those that actually use these terms in conjunction are usually trying to get the gates shut down and the asinks destroyed.