A Land Shark with an ability was definitely fearsome and if it could advance, gaining another ability, it would definitely be the ruler amongst the forest as its strength would definitely soar.
The Earth swim ability allows the beast to pad through the ground as though it was fish to water. Its body releases a wired undulations that seem to scatter the bonds holding the molecules in the sand for a few seconds.
The undulation from the body would disturb the molecular structure of sands or rocks nearby, turning them as soft as dust in just a few seconds allowing the beast to pass through and when the undulation stops, the molecular structure would gather back into its previous form.
Either to sand or to rocks.. And in simple definition, the undulation soften any hard rocks or sand for a few seconds which would then gather back if the undulation were absent.
'How the hell does did a mutated beast develop a skill? This is cheating!' he shouted in fury!
"Hmph!"