Blue Goblin Dragon

Egg:

This egg has a blue flame sitting upon it and is adorned with bone-like spikes that look like teeth.

It feels like this egg has spiritual powers.

Hatch:

This dragon feels like it's made out of blue flames. The horns on its head are short and its tail is ethereal. 

It behaves like a trickster and likes to pull pranks on passers-by, but it will always stay hidden. It is very rare to sight this dragon when it is this young.

Hatchling:

Its horns are starting to grow longer as its body grows a coat that looks like a ghostly tattered cloak. Its flamed tail also seems to be getting bigger and more fiery.

It is no longer afraid of being seen and in fact will sometimes let humans sneak a peek before disappearing, making them doubt if they've even seen it in the first place. Rumours have started to spread that sighting one of this dragon will bring about good luck. 

Adult:

In its adult form, its horns have grown longer and so has its fangs. Half its body is now consumed by flames that burn blue and bright. It has a scary face that it uses to frighten humans for fun.

However despite its scary face, it is only playful and rarely aggressive. Due to it being a symbol of good luck, humans do not try to chase it away.