Sandworm

Sandworms a giant worm-like guardians that protect the island's windmills in the Isle of Gust. They are completely docile until an intruder comes across the land in which they thrive. Sandworms burrow underground and can be seen as moving mounds of dirt. Link found a way to ignore these beasts by slowly walking as to not alarm them. He also found a way to trick these creatures by throwing bombs which cause the Sandworms to immediately swallow it and eventually exploding inside, thus defeating it.