TITANS is Hearthstone's 24th expansion, featuring new 145 collectible cards. The expansion takes place in the distant past, just after the defeat of the Old Gods, before life inhabited Azeroth. The Titans are gathering in Ulduar to prepare the planet for the Age of Mortals. TITANS introduces 2 new keywords: Forge and Titan. Forge cards can be dragged into the player's deck to pay 2 mana and upgrade it, then return the card to the player's hand. Minions with the Titan keyword have three unique abilities that they activate instead of attacking normally. TITANS also features the return of the keyword Magnetic, featuring new class cards with Magnetic for classes that previously didn't have access to it.