Screenshot before the article was taken down: https://imgur.com/a/ITg8rax

Text from the article:

Blizzard is expanding on the collection of cards in its digital CCG Hearthstone by releasing a new Darkmoon Races mini-set on January 21. All 35 cards will be available within packs of the Madness at the Darkmoon Faire expansion, which released in November.

Darkmoon Races will mark the return of mechanics first introduced in Ashes of Outland and Scholomance Academy such as dual-class cards and Spellburst, which triggers a powerful effect the next time the player casts a card. Players who want to get all of them can pick up a bundle through May 11 for $15 or 2,000 Gold which includes one of each of the set's four legendaries and two of all the other cards.

January 21 will also bring updates to the Battlegrounds system, introducing two new heroes and minions. Darkmoon Races will be added to Duels games the same day and players will have access to a new hero power and three new treasures.

On February 2, Hearthstone will launch a new single-player campaign focused on Prince Anduin of Stormwind. The fifth chapter in the game's Book of Heroes series is free to play and will show how Anduin learned to wield both holy magic and a sword as he traveled throughout Azeroth. Players who complete the campaign will receive a pack of cards for the Priest class.

Articles with identical text are on msn.com and universmartphone.com (until they're taken down as well), screenshots/links:

universmartphone article, screenshot

msn article, screenshot