Rose nods, following along fully. "Like slitheen and blathereen. They were actually family names of of mercenaries from Raxacallicofallop--" pause, thinks, "ritorious. I think." Waves a hand. "But they were going to nuke Earth and sell it off as fuel slag." She thinks some more, processing everything. "So five-ish, if that. And super durable, like the Doctor and his cheating death trick. Was that how Frieza was able to die-but-not? Or he's not Saiyan too I take it?"