The Naga are coming to Hearthstone Battlegrounds on May 10

pcgamer.com:

The first-ever Hearthstone Battlegrounds season, Rise of the Naga, will get underway on May 10 with a reset of player ratings, a new hero, and an all-new minion type: The naga, a magic-focused race that will grant spells or become more powerful when spells are played around them (and also, not coincidentally, are the focus of the current Voyage to the Sunken CIty expansion).

First, a note about Hearthstone Battlegrounds seasons, because you might recall that Battlegrounds has in fact had previous seasons, such as the one that wrapped up in January. In April, however, Blizzard announced that Battleground would begin organizing its «major moments» into seasons, which it said «will help give a clearer idea of when big changes—like special events, keywords, or system changes—are coming to the mode, as well as when they will be ending.» In other words, same name, different purpose.

Back to the matter at hand: Some of your new naga minions will be able to take advantage of a new keyword, Spellcraft, which grants a spell each turn that can provide a temporary buff to your minions. Spellcraft spells leave your hand at the end of each turn, but if your hand is full, they will «wait» until a free spot opens up rather than being destroyed or delayed.

Battlegrounds' new hero is also naga: Queen Azshara, once the beloved ruler of the Kaldorei Empire, who along with many of her Highborne followers fell into the depths of the Great Sea after the collapse of the Well of Eternity and was transformed by the Old Gods into the serpentine naga.

Blizzard also offered a few tips on handling these new minions:

A total of five minions will be removed from Hearthstone Battlegrounds in patch 23.2, which will kick off Rise of the Naga. They'll be