Dynidon

The boss of Exploring a hole is a giant worm. He has the capabilities to summon eggs which, if not destroyed, after a short duration spawn red worms. These worms have no particular resistance and can be disposed of in any way, but should always be taken care of immediately after being summoned by the boss or their numbers may begin to overwhelm you. This is especially true if you do not have damage types that can hit multiple enemies at once. The boss can also summon smaller versions of itself which do not have to be defeated for the boss fight to continue, although, will pose a large risk if not taken care of fairly quickly. The mini boss worms wave from side to side slamming their head down for a small area of damage and have much more hit points than the small red worms but much less than the boss. The boss uses the same attack pattern as its mini version waving its head side to side for a larger hit box. During this phase he can kill off his friendly red worms. You can only attack the top part of the bosses head. If it swings down to the left, you have to attack from the right.