Assassin's Creed Valhalla players have discovered a secret powerful weapon hidden in a pile of rocks. Well. Kind of.
The secret Nodens' Isu Arc bow unlocks for players who repeatedly hit a small pile of rocks near Brunson Turret in Northumbria. In the lake to the north, there's a small island, and on there, you'll find the rock ore pile you need.
YouTuber JorRaptor takes you through the steps right here (thanks, Kotaku) and it's been verified now by a number of players: