Hello everyone. Tell me, is it possible to get heroes for visiting the game through dark and ancient fragments? It is written that they cannot be obtained through sacred fragments.

Yes, you can get the login rewards champions from ancient shards, so some people do have duplicates of those champions. It's only on sacreds that they are blocked. Not from void shards since you can only get void affinity champions from void shards. 

Thank you for your answer, and good luck at the game)))