@Estrèlla ~
Keep in mind that as a baby, Xypher will not be very powerful when it comes to his lava ability. And it'll always be the floor melting. It won't just randomly appear. XD
His night vision doesn't really make much sense. The natural habitat of an Obsidian Dragon is the insides of a volcano, which means constantly around really bright, molten earth. If anything, his vision wouldn't be as good as other dragons to keep him from being super-duper sensitive to light.
Wait…so you're saying that not only is he strong and has a strong attacking capability, but he's also durable on the outside and with his mental capabilities? That makes no sense. It would mean your dragon is impenetrable. PLUS, when he makes the Pact with his rider, he won't have that at all, as all dragons give up their immortal minds so that their humans can speak to them without pain. (that's something that'll be explained in depth in the IC) I don't see his mental fortitude being very high, since Obsidians are more brawn than brain.
Endurance will depend on climate. Obsidians are sensitive to cold on extreme measures, so if he's not in a comfortable, hot environment, he's not going to be able to train for extended periods of time. However, were he, let's say in the middle of the desert, he could then begin to stay awake longer and train for extended periods.
Which brings me to my next issue…your dragon is immune to ALL fire and heat…yet only highly dislikes the cold? I say no, and here's why: Obsidians live in only one part of Partheus, and that's volcanoes. The reason behind this is because they are very comfortable in heat and sensitive to climate change. WATER would negatively affect your dragon. Being around large bodies of water will most likely make him sluggish, and cold temperatures and ice can be fatal if not properly cared for right away.
I love your patches of scales missing. It's a key weak point in the dragon. <3 Kudos.
Pretty sure that's it, though.
Also, as for your question a few posts back about the riders being paired with their dragons, you lead me to my own question.
THIS GOES FOR EVERYONE!
In the introduction, everyone will be led into the old Silver Dragon Lair beneath the central mountain on Silver Tail Island where Aki and Mauras have made a home as well as a place to safely train the new riders and baby dragons. Each rider will slowly be drawn to a specific cavern within the cave (I'll be making a map once I find the time) where their egg waits to hatch. UPON THE ARRIVAL OF THEIR RIDER, EACH DRAGON WILL HATCH. This will be in a random order, and I'll roll to see who hatches first.
BUT
My question is would you all like to write out how your dragons hatch? If so, I'll explain in the intro post the appearance of each egg individually, and you can take if from there. Each of you can begin to express the individual personalities of the characters through the hatching process in whatever way you'd like. ^^