I made this mod because the idea randomly came to me right before I went to sleep.
This mod adds a boss named killmkill97. He is extremely powerful. It also adds items that can be used to fight against the boss. The boss drops Devium Ingots when defeated. You can use them to craft some OP items.
Note 1: If a purple cube suddenly appears and stops your time, it's already too late. Use your shield before your time gets stopped.
Note 2: The balance is still a bit rough. I'll keep improving it.

