The clentaminator is pretty effective at changing the environment if you haven’t played since the update it was introduced in. It acts like a sort of flame thrower type gun with a long range that converts biomes
However destroying altars with the golden hammer will spawn random blocks of corruption or chrimson in your world. So you might have leaks regardless. Still better to but walls or trenches. Have fun
Noted
The clentaminator is pretty effective at changing the environment if you haven’t played since the update it was introduced in. It acts like a sort of flame thrower type gun with a long range that converts biomes
https://terraria.wiki.gg/wiki/Clentaminator
It’s very expensive though, you might want to create a money farm
However destroying altars with the golden hammer will spawn random blocks of corruption or chrimson in your world. So you might have leaks regardless. Still better to but walls or trenches. Have fun