Shrouded Stalfos is an enemy that appears in Link's Awakening, Oracle of Seasons, and Oracle of Ages. They are a particular kind of Stalfos covered in a blue cloak. Unlike normal Stalfos, they do not jump into the air to attack. Instead, they wander around an area, behaving similarly to Moblins. There are two different types: one shoots arrows, and the other carries a sword and a shield. Both variations can be easily defeated with one sword slash and most other weapons.
Shrouded Stalfos appear in a wide variety of areas, including dungeons and out on the overworld. In Link's Awakening, a puzzle in Bottle Grotto requires that Link defeats a Shrouded Stalfos after a Pols Voice and Keese in order to obtain a Small Key.
Shrouded Stalfos from Link's Awakening (2019)