Shroud Hearth Barrow
Shroud Hearth Barrow is a Nordic ruin located just outside Ivarstead. Wilhelm at the Vilemyr Inn suggests that the barrow should be investigated since Wyndelius Gatharian went missing.
Upon entering, the Dragonborn hears "Leave this place!". Disregarding that, they can enter and find four levers which control the doors to the interior. The correct levers to activate are the two closest to the doorway, one on either side.
Farther inside, they find a door which requires the Sapphire Dragon Claw to open.
This area contains a boss and a word wall where the Dragonborn can learn Kaan.