Purpose Of Existence Chapter 22: Where it all ended, starts here.

"Reclaimer I have a suggestion".

Chief wondered why the AI has been so quiet since their arrival at Ark. "Im listening". They were currently located in Infinity's hangar bay. Soon they would be disembarking to Ark. The only reason they were still onboard was that they were waiting for the ground grew to set up a forward base. The Captains of both UNSC vessels had a meeting where they discussed the ongoing and past events.

"I believe you were at Ark before. I must be completely honest with you…" He paused for a moment.

"So have I" Chief stopped hearing this. "What do you mean, so have you?" He asked confused. Bias was a forerunner monitor, certainly it woudn't be that weird for him to have been on Ark before?

"I believe you misunderstand. I wasn't here on my own accord...I was here onboard the Covenant holy city of High Charity". If Chief was surprised he didn't show it. Not that he could have told anyway, the Reclaimer was rather...stoic on the emotional side. "Why?" He asked.

"Pardon?" The AI asked confused. "Why were you onboard a Covenant vessel. Especially one of their most "holy" relics?" Chief clarified.

Medicant was quiet for a moment. "I...Was onbaord the forerunner keyship you used to escape High Charity. I was the reason you Anchilla had so much problems to keep the ship in bay. She fought quite impressively I must say. I understand why you are so...Keen of her". Bias finished.

"hmh, she always was a fighter". Chief muttered more to himself than Bias. "But you wanted to suggest something what was it?" He continued getting back in business. Enought time had been wasted already.

"Ah yes indeed. During the fall of the forerunners. I was broken into pieces and transported to multiple ships. All of these ships had the same goal of travelling to installation 00 or ark as you call it. However some of these ships never made it so I was never put back together. One of these lost pieces is this one. The Covenant found me and my keyship. They installed it to their "holy city" and used it as a power source".

"What does this have to do with getting out of here? We need to find something to open a portal back to earth or other method of transportation. The portal to Ark was shut down during Cortana's initial attack". Chief stated.

"Reclaimer, as you well know that same keyship was the one to travel trought the earth's portal and arrive here at Ark. I believe that two of my pieces have already been reunited. The second piece was residing inside the Ark's systems. Now if you truly want to find a way out of here...You must complete me. Im certain that if there is someone that knows a way to earth it's my remaining half". Bias finished waiting for Chief's answer.

"If we were to find the rest of you...Where would you be?" This was one of the big questions that bugged him and could determine the "worthiness" of his idea.

"Why inside the ark's main control room of course". He said it like it was nothing. Goddam self explanatory. "The same very place, where The Gravemind lived". Chief finished. "I believe we both know there is 0% possibility of anything surviving the firing of the halo array that was residing in orbit of the ark. The Gravemind is dead and im our ticket of this forsaken husk of a former forerunner glory".

"That's rather strong opinion about your creators". Chief observed and waited for the AI to clarify.

"I am well aware of this. Let's just say that I do not have the most brightest of memories from this place and I would very much like to leave as soon as possible". Chief almost chuckled to this "Well there's at least something we very much agree on".

"Then shall we. The faster we leave the better I feel". Bias was clearly unnerved, it almost felt like he knew something they didn't. Something game changing and something that even the greatest AI ever created by the forerunners feared.

"We have to inform Doctor Halsey and gather the Spartans. There is no time to waste. These Banished can be dealt with after I have rescued Cortana". With this Bias got curious "You seem very certain that you are capable of rescuing her? How do you know she isn't doing this by her own free will?"

The Chief never answered.

Allright I have to clarify some things. These has been kinda filler chapters but I felt like these things had to be adressed. The games never truly go deep to Medicant Biase's lore so I explained it here. There also never was a indication that even when his two parts connected that he was complete. I also felt like that I should say it out loud: The Chief is certain that he will rescue Cortana. However he isn't certain if he's rescuing her from herself or from something or someone else.