This mod adds a tamable and rideable dragon mob which can be hatched from the dragon egg.
Build this:

Place the dragon egg in the middle.
Tamable using a chorus flower (right click)
I know what you're thinking, give up the dragon egg? Only have one dragon pet?
No.
Dragon nests are a new structure which will spawn in the end, in addition to loot it has a chance to generate a new dragon egg.


