Sandworm and Molebug

[Maelstrom]

So here are my Ideas for special Monsters which uses some different paths than the Player can use.

So a Sandworm is an Enemy for Desert areas. It can "swim" inside the Sand slowly. Is he near the Surface a small "dustcloud" shows where he is digging. He Attacks from the Ground and can be killed if dug out giving Sandworm Leather.

Molebugs are Bugs who are only active at night. They dig themselves into the Dirt if the Sun is shining. At night he hunts the players, at Day he attacks the players if the Dirtblock he was sleeping in was dug out. If the dirtblock has another dirt or Sandblock above it for some reason at the next night he moves directly into the block above and dig himself out of that block. If it is a wood or stone floor directly above him he vanishes like he died in suffocating agony.

Both Mobs shall provide a REASON to build a floor out of Wood or stone for houses to eliminate the possibility for spawning Monsters.