The Demon Hunter Initiate set is awarded for completing a chapter of Galakrond's Awakening

[Jetz72]

https://us.forums.blizzard.com/en/hearthstone/t/received-demon-hunter-cards-on-2703/27254

You announced players would receive the demon hunter hero and 30 cards on April 2nd after releasing a solo adventure. However I received 20 of them after completing chapter III of galakronds awakening.

https://www.reddit.com/r/hearthstone/comments/fpgz18/so_i_just_bought_galakronds_awakening_and_after/

So I just bought Galakrond's Awakening, and after completing E.V.I.L. Chapter 2 I was awarded all the Demon Hunter Initiate cards. Blizzard???

Nobody seems to be reporting a lack of the intended rewards for these chapters, so it would seem the cards are given in addition to them, rather than in place of them. So this should get sorted out in time.

[Jetz72]

https://www.reddit.com/r/hearthstone/comments/fpuf7e/you_can_get_all_demon_hunter_cards_early_by/flndmx2/

Did you actually get the intended reward from the chapter as well, or did these unusable cards take its place?

Luckily got them both. Rising Winds and Fist of Ra-den first, then I got all these DH cards.

Should be sorted in time then. Unless they later get a second copy of the Initiate set.

Also, only affects people who didn't have the rewards from the adventure, so you can't do this by replaying the content sadly.