Talk:Demon Altar/@comment-75.174.41.166-20120409211439/@comment-92.20.130.75-20120422170526

Yep, destroying these does, I'ma refer to a note... "Destroying a Demon Altar will also result in one block of Pearlstone (Hallow) and one block of Ebonstone (Corruption) spawning in a random location in the rock layer of the map." so yes, one block of hollow and corruption WILL be randomly placed in the stone layer when you destroy one and will spread, a huge pain I know. But, you can use things like TEEDIT to nip the corruption/hallow in the bud by simply editiing it out.