This is bait for fishing. Equip a fishing rod and then use this bait on water that you are standing next to in order to start fishing. This bait actually travels through a wormhole into a dark dimension and catches things there, instead of in the water. Minorly bad things.
Minor Otherworldly Bait price in Growtopia: sells for about 133/WL (median of 16 offers from community Discords, past 30 days). Live price chart and the latest buy and sell offers.
Recently sold at: DRAZERK, OBAIT, YUTSHOP, FISHDAY, YAPI