The Giant Worm essentially moves underground and attacks the player by surprise when it is in its location. However, it leaves a trail of drag behind it when it moves, allowing the player to anticipate the ambush.
Unlike its previous appearance, the Giant Worm looks more like a caterpillar and no longer moves underground. He simply crawls slowly towards the player (even when he is behind it) to inflict damage on contact. In addition, it is possible to stand on it without taking damage.
Gaining dominance over its soul allow Soma to recover HP by standing around and not moving.
It is a palette swap of the Poison Worm from the same game.