Hostile worms

To make bane of arthropods more useful, I think Minecraft should add hostile worms to Minecraft. There should be three variants to the worm: a sand worm, a cave worm, and a soul worm. Each worm should be able to travel through a certain block. Sand worms would have sand, cave worms would have stone, and soul worms would have soul sand and soil. The sand and cave worms would have six hearts and do 1 heart of damage, and the soul worm would have 7 hearts and do 1 1/2 hearts of damage. Upon death they could drop 0-1 of the block that they burrow through, 0-2 teeth, and 0-1 worm skin, which might be worm specific.