They look like a whole bunch of big fangs. Eve monster comin'ta getcha! Perfect since they also happen to spew fire, and the purple background goes nicely with the whole monster feel. EDIT: Well, I mean their vacuum ISPs are as good as anything else non-nuclear, and they've got decent thrust too. No thrust vectoring, but adequate RCS can cover for that. If you happen to have a good way of flying an Eve lander out to Tylo, I don't see why it wouldn't work. Might be a little overkill, but I mean there's working and there's being efficient. EDIT EDIT: I'm dumb. Eve landers have PARACHUTES. Aerospikes still could work for Tylo though.