The Land Worm is an enemy in Final Fantasy Mystic Quest.
It is something of a threat, as Quake spell does heavy damage to both party members, and it has high HP. It can also lower the character's Speed with Quicksand. However, it is vulnerable to axe attacks.
The Land Worm has two phases to the battle. For the first phase, its head is raised, but after losing a significant amount of health, its head is instead facefirst into the ground, implying it was either decapitated or in the middle of burrowing.