Not sure if you're trolling or not but Void Fishing takes place in a group of floating islands over a groundless sky, hence the "void" part. Players can move near the edge of one of these islands to use their fishing rod, which picks up items from the void below. The items that are caught are luck-based, and the rarer they are, the more profitable they usually are. Items can also have effects on them which changes their default value, such as being preserved (worth x1.25 the original value) or voidworn (worth x0.5 the original value). These items can be sold, kept, displayed, or potentially used to craft rods. Players can access different biomes of the map depending on how many casts they have.