"This one is upright."
"And this one is up-side-down."

- GraveMind, the Philosopher.

Scariest part is that the Gravemind isn't just smart, it's a damn genius philosopher.

You can see the grave mind holds the chief with just one tendril and holds the arbiter with 3. The arbiter is struggling and is combative while master chief is cool and calm.

"1.2 trillion simulated and one actual." I've always found that one line subtly terrifying

“I have listened, through rock, and metal, and time. Now I shall talk, and you shall listen.”

Goes unbelievably hard

The fact that it could hear Cortana through chiefs helmet is quite impressive.

The fact that the gravemind shakes when it talks about the monitors “containment” shows how damn smart this zombie cabbage is.

Space zombies is terrifying enough ..but space zombies with great intelligence is just beyond horrifying

I love how the arbiter even though he's captured still has the time to call chief demon 😁 the hate was deep at that point

"I, I am a monument to all your sins" best line ever.

its crazy to think that chief and the arbiter talk more to each other here than in the entirety of halo 3's campaign

It’s insane how much Biomass is utilized to make a gravemind.. and that isnt even its final form! Just imagine a Keymind..

I love the detail that the Gravemind rubs the Chief’s visor when he mentions that his mind is concluded, in a sense caressing his “face”. But then it flips the Arbiter upside-down when mentioning his faith, quite literally turning his world on its head and breaking the news to Thel that he is delusional.

For anyone wondering what the gravemind meant by “I am a monument to all your sin” he wasn’t talking about specifically chiefs sins, he was referring to the sins of the forerunners, the flood was originally a species called the precursors, they created all life in the universe and originally gave the mantle of responsibility to the forerunners, however the forerunners have proven to be unworthy of it and the precursors intended on giving it to the ancient humans instead, the forerunners couldn’t accept this and went to war with the precursors and nearly wiped them all out, the surviving precursors broke themselves down and turned themselves into a fine dust in order to hide from the forerunners, this dust however got corrupted over time and eventually became the flood, the flood had the same goal as the precursors but they believed that they were worthy of the mantle and believed that true unity could be achieved if they turned everything into flood, in short the flood was created because of the sins of the forerunners.

“This one is machine and nerve, and has its mind concluded.”
“This one is but flesh and faith, and is the more deluded.”

“FATE HAS HAD US MEET AS FOES, BUT THIS RING WILL MAKE US BROTHERS.”

Short version: Gravemind needed both of them to destroy the Halo rings so it and the rest of the flood can survive.

I love how Gravemind shudders at the word "containment". You can just sense the rage he's holding back at what was done to him.

I really like the fact, that the Gravemind talks in rhyme, just because it thinks much faster than it talks, so It just can't help but overdue such tedious act as vocal communication.  It's beyond need to tell someone anything. It knows all the Flood, and all Flood knows what he knows. That's why the Flood is so terrifying,  yet so awesome

The way the Gravemind shutters when he says "containment" is such a nice little detail. Even back then, Bungie established the Flood's hatred for the Forerunners