Species: Void Dragon
If you travel far from The Keep, you will find the darkest hills and mountains spotted with fresh-made caves. These caves contain dragon hoards, and it is best to step lightly near the treasures, for they are heavily guarded. Dragons are extremely protective of their collections, and with mouths large enough to swallow a man whole, it's prudent not to provoke them. Massive beings, dragons never cease growing, the most ancient dragons being the largest. Dragons possess powerful magical properties, and love helping their masters learn.
You've been traveling for days, traversing mountains that seem to grow larger with each passing day. The farther a magi explores, the rarer the species he is likely to encounter. You would have given up this adventure long ago if it weren't for this knowledge. Nearing the top of one particularly steep slope, you catch a fleeting glimpse of an ebony tail slithering around a corner. With soft feet you approach, catching a glimpse of a legendary draconian retreating into a cave.