Discounts are in effect in the Battle.net store. A range of PC games are being sold at reduced prices until September 4th, including all three versions of Diablo IV. The standard version can be yours for 55 euros (regular price 70). Other editions are also being sold at 20-25 percent off the regular price.
Other discounted games worth mentioning are Diablo 2 Resurrected (20 euros, regular price 30 euros), WoW: Dragonflight (25 euros instead of 50), and CoD: Modern Warfare 2 at half price (35 euros).