Jak and Daxter learn that Praxis engineered the war with the Metal Heads, bribing them with eco to attack the city just enough that he remain in command. However, the arrangement went sour and the Metal Heads began attacking the city more and more. Unable to defeat the Metal Heads, Praxis obtains the Precursor Stone, a large gem that contains the essence of the last living Precursor. He intends to weaponize the Stone and use it to destroy the Metal Head home nest, unaware that doing so will also destroy Haven City. Krew, a crime lord with ties to the Underground, builds a bomb strong enough to release the Stone's energy, but is subsequently killed when Jak detonates the bomb prematurely.