The Witchwood is Hearthstone's eighth expansion, featuring 135 new collectible cards and the new Druid alternate hero Lunara.
The expansion introduced three new keywords: Start of Game, Echo, which allows a card to be played multiple times on the same turn, and Rush, which acts like Charge but doesn't allow the minion to attack the enemy hero the turn it is played. It also added a new game mode called Monster Hunt, a single-player mode akin to Dungeon Run with four exclusive playable classes.
As the first expansion of 2018, the release of The Witchwood ended the previous Standard year, the Year of the Mammoth, and started the new one, Year of the Raven. (User summary.)