Dragon meteors: Dragon meteors are one of the known entities capable of of space travel without the use of ether technology or galactic energy
Resembling large scaled creatures, in a variety of dark colors, they generally have four limbs ending in feet with four curved claws used for hooking onto meteors or spaceships if encountered. Known to have anywhere from one to three heads, all eyeless, filled with three rows of serrated teeth, capable of gouging out holes in comets or piercing the hull of a unlucky spaceship.
Occasionally one such creature will crash onto the surface of a planet. Once it has recovered from the crash it will set about looking for the nearest archway. The creature will enter the archway, however it will not exit on the other known side, it is believe that they are capable of exiting in deep space, returning to their vacuum bound existence.