I already know that I need to travel to an underground Hallow/Corruption to get their respective souls from any enemy in the area. What I want to know is, is there an efficient method for farming them?
I know there are a lot of mob grinders using the new statues to generate gold (like killing bunnies during a bloodmoon).
Similarly, I know back when Jungle Armor was a rare drop in the Underground Jungle, people built a small room with a bed and a thin film of lava along the top, with one wall that encouraged Hornets to bounce down toward them and die.
So, is there an efficient way of doing something similar in the underground Hallow/Corruption by standing near a bed and a hazard (timed dart traps, thin lava, etc.)?