World Expander

The world expander is an item that expands your world upwards, downwards, and "sidewards." You craft the World expander with 10 dirt fragments,10 stone fragments, 10 cloud fragments, ash fragments, 10 sand fragments, and 10 snow fragments. it expands you world just enough to complete the oceans, which will contain the trench, and also expand upward, letting you go to space for real with no gravity and a higher spawn rate for martian probes. it is technically craftabe pre-hardmode, but all of the new things to do are intended for hardmode. When you use the world expander, you will recieve the achivement "bigger is better".