It has 99,999,999 hp, +100,000 atk, +90,000 total badass, +10,000 spd, +9,000 flying spd, raises intimidation by 400 levels, raises cooking strength by 9,000 levels, regains the ability to fly, and gains the ability to pass through the Underworld. It's fire is now as hot as the sun in a controlled beam that does not affect anything that is enchanted with Dragon Flame and Hell Enchantment Strengthening, which creates the Hellfire Dragon Flame, which is completely fire proof and impossible to melt. It is still the same dragon as the baby dragon.

After it dies, once the skin and guts and all of that has deteriorated (will be completely decayed within a week after death) and there are only bones left and they are in the same places they should be when it was alive, then you have a week to enchant the "Dragon Bones" with Regeneration, Bones of the Dead, Witches Curse, and Soul Binding. After that, you will need to beat the Grim Reaper and recieve the "Reaper's Scythe" and with it, collect 10,000 souls and bind them to the now enchanted "Dragon Bones" within the ten years after enchanting. If you (other people can help, even if you die) fail to do these things in this order within the time limit, the bones will turn to dust. But if you are able to do it within the time limit, then the souls you bound will be replaced with your dragon's soul and the bones will be reanimated. Your dragon is now at it's Hellfire Dragon stage

A baby dragon is born with around 2000 hp, +100 atk, and +1000 badass cuteness. When it reaches it's adult stage, it has around 6000 hp, +500 atk, +3000 total badass, +300 flying spd, +4000 spd, raises intimidation by 40 levels, raises your cooking strength by 20 levels, gains the ability to fly and to speak telepathically. At elder, it has 5000 hp, +350 atk, +1,000 total badass, -200 spd, raises intimidation by 20 levels, raises wisdom by 60 levels, loses the ability to fly, can see the future, and constantly tired. It takes around 20 years for a baby dragon to get to its adult stage, and around 300 years from the start of the adult stage to get to elder. Once it gets to elder, it has around 20-40 years left.