If you're on hardmode, yes the Ebonstone will spread the corrupt. Also NPCs will not move into a house made of Ebonstone as they won't live in a corrupt area.
1 Answers · Games & Recreation · 15/02/2014
From what I know, they are 100% randomly generated. So they can spawn anywhere in the map, they could be near the surface, half way into the map, or even close to the underworld. I would suggest digging around more to find them. Also those shadow orbs spawn a...
1 Answers · Games & Recreation · 12/04/2013