A great deal has arrived in the Hearthstone store for just $5 which gives you cards from Standard sets!
The new bundle was added this afternoon and comes with a random legendary card and five standard packs. These packs are a new type of pack that will only give you cards in the current standard rotation. If you want to maximize value, you should be able to keep these packs and open them after the mini-set releases or the next expansion so you can target new cards you are missing in your collection.
The bundle is available through May 24, 2021, and can be purchased for $5 in-game or on the Battle.net shop.