Dragons

Dragons are one of the apex predators on Elion, alongside Leviathans, Giants, and other dragon-like creatures (Wyverns, Drakes, Etc.), that possess four limbs to walk and two or more extra limbs used to fly.

They are seen as invincible flying tanks, and rightfully so since their natural scales, which can be virtually any color, have a metallic quality that makes dragons resistant to magic, with the ability to spit being one of their most common assets; Dragons will spit fire, boulders, ice, lightning, and pretty much anything conceivable.

Biology
Dragons have four legs and two wings, and originally evolved from Drakes. They generally have the innate ability to spit as a sort of defense mechanism, though some dragons have turned this into breathing fire or spitting out boulders, depending on their size, and even a few have been recorded to spit lightning or have electrical protection along their hide. A dragon never stops growing throughout its life (though this rate slows down to a point where it will become negligible), and size is no problem as long as they can sustain themselves since internal heat is monitored and the dragon's metabolism is adjusted accordingly, being endotherms. A dragon can become vastly intelligent, though size is a large factor as a dragon's brain  scales  with their size. They do have scales that are thicker and tougher than steel, though these scales are incredibly useless since they cannot be shaped since they are too brittle, and drilling a hole through a scale just breaks scales outright. An unusual part of dragons is that they seem to have redundancy upon redundancy put in place since their bodies, when grown to a large enough size, will begin to grow extra organs and change how the bones of the dragon grows in order to support more weight. Some dragons can have up to a thousand hearts and bones of metal, if provided suitable nutrition.

Dragons are not a species, but a genus, since Dragons are so diverse and varied. A few dragons have even adapted to the water, their wings angling and turning into massive flippers while their legs become hand-like, used to grab onto very-frightened prey. Dragons will almost always build a nest and mate for life, and the only reason the ecosystem can support such undefeatable behemoths is due to magical energy which can serve as nutrition for a dragon.

Inter-Species Relations
Dragons are seen as gigantic beings that must be either feared or adored, depending on how the local dragons behave, since dragons can be anywhere from nice and adoring of other sentient races to genocidal. Dragons are normally solitary creatures that kick their young out as soon as possible, generally right after they hatch, though a dragon egg can take anywhere from a few decades to a few millennium just to hatch.