This week's big Assassin's Creed Valhalla update added a new mode to the game, Mastery Challenge, which offers a series of repeatable maps to stomp and stealth your way through in return for fresh rewards.
We knew the gist of all this already - and we'll go into more detail below - but what has come as a nice surprise is the new narrative this mode folds into the game, including a tease for something else being added to Valhalla down the line.
The Mastery Challenge questline begins with a bang, as a meteor hits Eivor's Ravensthorpe. The impact reveals a door, apparently concealed within the cliffside all this time, and a mysterious woman, Hildiran, who's now investigating what's going on.