I bet your asking, "But what about how to "Summon" the boss?" See that familiar-looking guy? That is a "Corrupted Player"! They have the same spawn rate as the "UFO", whick starts the Martian Madness event. 5000/5000HP. Contact with him deals 75 Damage WO armour. Killing this mob will trigger the boss fight. Battle Tips are below.↓