Skeldritch

Skeldritch is the fifth boss in Spirit Tracks. Its appearance is very similar to that of Stallord; it appears as a large skull with a spine that rises from the center of a large, ruinous room filled with sand, although it lacks arms and a ribcage, and it also sports a large, horned helmet. The skull is also more human-like than Stallord's beast-like skull.

Strategy
Skeldritch will fire large rocks at Link, at which point, he will need to use the Sand Wand to create walls of sand that will deflect the attacks. He can then pick up one of the rocks, launch it off a nearby catapult, and fire it back to one of Skelditch's vertebrates to destroy it. However, the last three bones are protected by armor, and are only open in a certain spot, while he attempts to attack Link with laser beam of sorts. When merely the head is left, it will float around the arena, and try to ram into Link. If he creates a sand wall, Skeldritch will try to penetrate it, and Link can sneak behind it to land blows on the Rupee-shaped Weak Point behind the skull.

Trivia

 * In the PAL version of Spirit Tracks, Skeldritch is named Capbone. The name most likely derives from the words cap and bone, as the boss sports a helmet (cap) and is skeletal in appearance (bone).
 * Skeldritch's name is derived from the words "skeleton" and "eldritch." "Eldritch" is a word meaning "unearthly," "alien," "supernatural," "weird," "spooky," or "eerie."