Instructions
Target the dimirus worm. Dimirus worms travel in packs and are good at hiding and avoiding attacks. To dispatch them, use your targeting options to select the most powerful worm.
Choose a suitable weapon. Dimirus worms cannot be defeated with spells or items, so you will need a blunt physical weapon, such as a sword or war hammer, to due significant damage to them.
Attack each worm one at a time, so they won't have a chance to suck your health and regenerate. The other worms may attack you at this time, but if you spread out your attacks between each worm, you will never fully kill one.