If you aren't planning on adding more reborn minions, why even give paladin the reborn quest

[Reinhardt-11645]

the devs have already stated they don’t like to add standalone cards, for newer players after a set. That’s why there was such an uproar over witch’s brew, which was basically echo.

New Card-Witch's Brew

We like to keep keywords to one set. All other Echo cards rotate out before this one, so it doesn’t make sense to have a keyword on a single card in a set. For a new player to jump in to Hearthstone, it can be difficult to learn a bunch of new keywords. By limiting the number of keywords that people have to learn, the easier it is to play Hearthstone. Witch’s Brew doesn’t suffer from being unreadable if we take the keyword off.