Tip by bareullah How to Unlock a Boss Battle For the corruption level 3 Holosimulation, if you manage to eliminate all the corruption, you will then get a shot at a boss battle against Rancor. LEGO Star Wars: Castaways TIPS MORE TIPS Where to Find Yellow Bricks How to Create/Join Races in the Island Hub What the Progress Bar mean in the Holosimulation Lobby Bypassing Locked Chapters How to Easily Complete the Dance Party Weekly Mission