Bosses

Required Bosses

 * Pax the Bearded
 * Ancient Tortoise
 * Zhǔ Owl
 * The Oscillator
 * The Beast
 * Parasite Ludo
 * Psycho Carcass
 * Lord of Fire

Optional Bosses

 * Cherished Son, Amp
 * Lord of Heroes
 * Parasite Ludo
 * Psycho Carcass
 * The Skipper