Announcing March of the Lich King, Hearthstone's Next Expansion! — Hearthstone — Blizzard News

The Undead are Reborn under Death Knights’ command in Hearthstone’s biggest expansion yet!

Rewards Track Refresh for March of the Lich King - Hearthstone

Blizzard unveils new co-op mode for Hearthstone Battlegrounds

March of the Lich King Heralds Hearthstone's Next Expansion - Death Knight Class, Minion Types, New Cards, and Mechanics Overview - Out of Games

Announcing March of the Lich King, Hearthstone's Next Expansion! - Hearthstone

Announcing Voyage to the Sunken City, Hearthstone's Next Expansion! - Hearthstone

March of the Lich King - New Hearthstone Expansion

26.0 Patch Notes — Hearthstone — Blizzard News

Hearthstone's March of the Lich King Expansion Announced - Hotspawn

March 15th Blizzard News & Blue Post Roundup - Hearthstone Anniversary Event, 10.2.6 Announcement - Wowhead News