 Dragons were all descended from Glaurung, the father of dragons, created by Morgoth in Angband during the First Age.They had a specific hypnotic power called a dragon spell, putting receivers of the spell under eternal sleep 

Great Eagles are sentient eagles who assist the elves in patrolling the land and watching for the movements of orcs and other evil creatures.The Nazgûl, or Ringwraiths, were the remnants of powerful kings and sorcerers of men.