You are mixing up Corruption and Raise Volcano/Armageddon. Corruption
leaves a square with some black "pollution". Priests (and shamen?)
can remove the corruption. To remove a volcano, you need to cast
Change Terrain.
Steve
>Steve
me & the other Myrror guy got in a corruption war... turned the entire plane
into a big black mess. I had black channels & so could turn my priests into
undead which didn't require food, and so I eventually starved the bum out.
(Un-dead priests meant I could keep a few squares clean per turn)