Obligated to work easily at Set up 05, John are implemented groundside in the a keen SOEIV along with multiple Orbital Lose Wonder Troopers. Cortana advised John of the Prophet off Regret’s intention to help you fire Halo and done its religion’s Higher Trip. Recognizing the extreme character of the threat, John are tasked that have finding and you can assassinating Regret.  He tracked the fresh new Prophet to a massive temple in the middle away from a lake, yet not in advance of witnessing countless Covenant ships coming out of Slipspace, followed by Large Charity, the Covenant’s holy urban area. Rapidly losing a power out-of Sangheili Award Shields, John assassinated the latest Prophet and you may escaped the forehead earlier try destroyed because of the the neighborhood supplier. John popped off the edge of the dwelling and with the lake below. 
Dropping awareness from the feeling, John try caught by the Flood’s central intelligence, this new Gravemind. Once, new Arbiter has also been captured. This new Gravemind appealed so you’re able to John’s prominent need for avoiding the capturing of your Halo assortment. Unwillingly, John assented. Brand new Gravemind upcoming tasked both captives which have locating the List, sending them to the 2 most likely places that it might be discovered. John is sent to Highest Charity, disrupting a good sermon by Prophet of Knowledge. The brand new conflict involving the Sangheili and you may Jiralhanae arrived because a direct results of John’s assassination of Be sorry for, top the Covenant to help you civil combat. 
John squandered no time during the devastating this new ranks of your own Prophet’s guardians, going after the latest enduring Hierarchs due to Higher Foundation. A passing Prophet of Mercy, infected from the mouth from the a beneficial Pod infector, snarled that Specifics got ordered his Dreadnought to help you World in which he perform complete the destruction of the people. John after that tore the brand new Pod infector out-of Mercy and surface they. Eventually, John try forced to log off Cortana behind. In case there is Halo’s activation, she’d detonate In the Emerald Clad’s reactors physically and you will pass away having the metropolis. John boarded the latest Anodyne Spirit, yet not before encouraging to go back getting Cortana just after he averted this new Covenant. 
Agreeable the brand new Anodyne Heart close Jupiter, John is actually called by the Io Station, however, maintained radio silence. Rampaging from the motorboat, the guy tried to discover the Prophet from Information and you may assassinate your. John discover themselves confronted by a highly large push off Covenant soldiers including about three Hunter pairs, exactly who fired into him additionally. He had been hit by several violence cannon beams, and you can try met with a good Brute Chieftain whom started initially to asked him regarding the “Key from Osanalan”.  However, the brand new Spartan caught the brand new Brute that have a great plasma grenade and you can fled. The principle continued his push from the ship, fundamentally to arrive within the Truth’s chambers and you may means their places to your Prophet. With Realities inside the views,  he was stuck because of the wonder because of the a great Jackal and you can test inside the the rear. The guy decrease and you may got in the front of the Prophet’s Brute guards.  John, with were not successful within his attempt to manage the brand new Predecessor Dreadnought’s trajectory, battled their way out of one’s Predecessor ship’s airlock from inside the an effective commandeered Ghost. On top of one’s Dreadnought, he was bought to track down ways to come back to Environment easily,  fundamentally tearing of a doorway and ultizing it a hot air-protect that so you’re able to plunge down on the globe less than.