I was mowing down hordes of Remans last night in "The Big Dig" when I noticed on my skill bar in one of the unassigned boxes a yellow Federation logo tab grayed out. I tried to click on it, and it did nothing, but when I hovered over it, it said "Assimilate This." After respawning, it was gone, and I have yet to see it again. Can anyone tell me what this is? My captain is a Federation Klington Sci officer.