Dark Castle Wiki

Stoneball is a special power in Return to Dark Castle. According to the game, "The stoneball power can permanently freeze most enemies, but at the cost of one elixir per use! Hold down the mouse button to charge the stoneball."

To get the stoneball, approach the witch in Witch's Cave.

The stoneball is especially useful on Burning Eye type enemies. It will also stop a Magic Broom, bucket, Wild Boar or Armored Guard.

If you use the stoneball on a regular Guard, then hit him with a Hammer, he will shatter and drop his Crossbow.

You have to hit the Black Knight in the face with a stoneball, then hit him repeatedly with the sword to kill him.