Mortal Kombat X for mobile launched last year, and to celebrate the one-year anniversary, it is receiving its largest content update ever.

Warner Bros. Interactive and developer NetherRealm Studios are adding two gold characters, a new currency and extra rewards and skins, as well as performance improvements and character balance tweaks. Here's a more detailed list from the press release:

• New Faction War Store and Currency: Blood Rubies, a new type of currency obtained through Faction Wars, have now been implemented and can be used in the brand-new Faction War Store. Improved leaderboards and more frequent Faction War Seasons give players more opportunities to win and earn rewards.
• New Rewards: Two new exclusive Gold Characters, Kobu Jutsu Tanya and Dark Emperor Liu Kang, and three new pieces of equipment including the Bloody Shokan Armor, Bloody Voodoo Doll and Bloody Tomahawk.
• New Challenge Characters: Five new Challenge Characters will be added over time, including Challenges to obtain new skins including Marksman Kung Jin, Dark Lord Kotal Kahn, Klassic Kano and more.

Update 1.8 is available now for iOS and will come to Android soon. The game is free-to-play with in-app purchases.