Hey!
Could you please help out to understand somethings!?! 
In Halo Legends, origins . ( BTW, Great Episodes
) I saw The Gravemind handing the Master Chief Some sort of AI. And teleported him to another place that looked like the ARC.
Could you please tell me when was that?
And who is the AI?
And where did MC got teleported?
Why did that happend?
And What sort of relationship the gravemind had with MC at that time?
And could you please tell me who is this AI It looked like 343 GS
I appreciate your help spartans.
LEWAA 10
PS: I posted this on Halo Universe without any response.
Maybe you could answer!?! 
I’ll say that, seeing as I know what you’re talking about, it was probably a harsh rehash of what happened in Halo 3, or it was when Master Chief got Cortana back in Halo: Evolution where he barged in, killing many a Floodling in the name of saving his companion. Other than that, I have no real clue where that is featured.
I think you saw my post in the Halo Universe forum, but I’ll re-post this here:
Halo Legends Origins has to cover a lot of content in a very short time. The best way to take Legends is to disregard the visuals, focusing on the story (a lot of artistic licenses were taken). With Origins, Cortana was entering Rampancy, so while a lot of the visuals are visually accurate, the events being depicted aren’t necessarily 100% accurate in regard to what happened.
The scene with the Chief and the Gravemind didn’t happen, and the Monitor was Guilty Spark.