Overnight, Hearthstone players in certain international regions saw Blizzard Entertainment increasing the prices for sets, mini-sets, and Runestones, by 600% or higher.

Players of the Hearthstone digital card game were aware that Update 25.4 would introduce the Return to Naxxramas mini-set. However, no one outside of Blizzard was informed of a price increase being applied until the company posted the announcement on its forums, giving less than 24 hours' notice of the change.

After the biggest Hearthstone expansion March of the Lich King last December 2022 was released, patch 25.4 would see the mini-set Return to Naxxramas add 38 new cards, as well as updates to the different game modes, such as Battlegrounds, Mercenaries, and Arena. But it also included high price changes in certain countries.

Blizzard posted the changes that would come to the regional pricing with the patch on its official forums (note that is the translated version from the original Spanish post):