From 4 July – 26 July server time, you can experience the new Diablo Immortal x World of Warcraft collaboration.
In the Shadow of the Frozen Throne Event, menacing Icecrown Citadel portals have been spotted in Sanctuary.
You must track down these portals, brave the bitter cold, and slay the invaders waiting within. Logging in to Diablo Immortal during this event will earn you the Frost Sorrow Avatar Frame and completing the event will grant you the Frostmourne Weapon Cosmetic.
You can also receive a World of Warcraft-inspired Icecrown Pathway Portal with any Diablo Immortal real money purchase until 26 July.
For more details, check out the blog: Here