It just really isn't a good week for Warriors 51C and Plantation Force, who seem to be particularly attractive to giant, monstrous rainbow spiders. There's only one this time, but it still manages to eat one warrior from each force as they lead it back to you for dispatching, again.
You send another giant rainbow spider monster in the direction of Hive Leukos. It does not arrive, either. Maybe it would be a good idea to send them with some company next time.
Another giant rainbow spider monster also manages to consume a couple of Hive Leukos' warriors before it is decisively put down.
A third giant rainbow spider monster briefly visits Hive Leukos, before suffering the same fate as its brethren.