Ebonstone Block

Ebonstone is a rock that can only be destroyed with higher tier pickaxes (Nightmare Pickaxe and Molten Pickaxe) or Dynamite.

You can turn it into normal stone with Purification Powder.

Eater of Souls will spawn anywhere where there is Ebonstone, for this reason Ebonstone is a good way to make a harvester for Eater of Souls. Making a house out of Ebonstone is not advised.