Exclusive to: Shipwrecked.
Dragoon Dens are naturally spawning Structures introduced in the Shipwrecked DLC. They are found inside the Volcano and spawn Dragoons. They can also be crafted, requiring 1 Dragoon Heart, 5 Rocks and 4 Obsidian to craft and an Alchemy Engine to prototype. Dragoon Dens cannot be Hammered, but they can be deconstructed using explosives, such as Gunpowder, Coconade or Slurtle Slime. It takes 2, 1, and 14 of each, respectively, to deconstruct a Den. Note that if using Slurtle Slime, it must be placed around the Den in 14 separate stacks.
They can house 3 to 4 Dragoons at a time. During the Day, one will leave the Den every 30 seconds, returning at Dusk. If a Dragoon dies, it takes 2 minutes for the Den to regenerate it.