Grim First Mort on Yer Back

Location: Lolosia
Price: N/A (Reward from the 'Deep Trobble Treasure Chest' quest)
Sellback: 0 AC
Rarity: Seasonal Item Rarity
Description: YARRRR! This floating ship-shaped dungeon was the BEST IDEA EVER… The dungeon goes to the challengers. There is no escape! AHAHAHAHAHAHA! (Changes over time).
Note: Randomly changes position upon movement.

Left Shoulder

Head

Right Shoulder

Right Shoulder + Grimskull Appears

Thanks to Apus and Necroticus.