Earth burrowing

Gulon

after gorging itself, the Gulon finds a narrow space between two trees or rocks and forcefully squeezes its bloated body through, causing it to regurgitate its meal

Hrökkáll

This acidic substance allows the creature to burrow through earth and rock, creating intricate networks of tunnels and chambers deep beneath the surface.

Mongolian Death Worm

the creature's alleged ability to burrow quickly into the sand, has led some cryptozoology enthusiasts to maintain that the lack of evidence does not necessarily disprove its existence.