https://www.pcgamer.com/the-elder-scrolls-online-dragon-bones-dlc-out-now-alongside-character-customisation-update/

MMO The Elder Scrolls Online has just added two new dungeons as part of its Dragon Bones DLC pack: Scalecaller Peak, the burial site of a long-dead Dragon Priest that's now full of cultists, and the ancient Dwarven ruin of Fang Lair, which is packed with necromancers. And yes, there will be a dragon to fight—or the reanimated bones of one, at least—and you'll get a Dragon Priest mask as soon as you set foot in one of the dungeons.

ESO Plus members get the DLC automatically, and for everyone else it will cost 1,500 crowns on the in-game store. That's £9/$15 of real money.