Never seen warm bodies?lol. Also,there are different types of undead. The traveler made the planets breathable so we could spread out,reproduce and eventually feed the traveler so it can be sustained before it moves to the next universe and or multiverse. This makes mercury habitable. Traveler is already confirmed evil and feeds off planets and prayer,Rasputin -blam!-ed the traveler up which is the only reason why we live..unlive? Whatever. Ghosts bring us back to revive the traveler and restart the travelers rampage. There you go. Basically a big rip off of star ocean till the end of time and dead space 3.