Because what dragons you see is determined by your level. Level up more and you will start fighting tougher dragons.
Higher level means stronger dragons so this will make you see stronger dragons and other opponents so your solution is to level up also blood dragons are common so just wait a while and eventually youll see one.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.