Is there a reason to keep all the dragons you don’t use ?
Technically you don’t have to keep them, but unless you’re desperate for Fish or Amber you don’t have to release them either. Generally, players release duplicate Common/Uncommon/Rare dragons, releasing duplicate Exclusive/Premium dragons depends on the kind of dragon.
Thanks, I do release the ones I already have just don’t know if I need to keep the 200 that I don’t use .
That’s up to you, but to be on the safe side, I wouldn’t. There are some dragons that don’t seem like much at first, but can get really useful later in the game.