Spoiler alert: A hell lot of spoilers you have been warned
Eren's POV
When I opened my eyes, I found my self again surrounded by the same darkness. I found the same being in front of me. I ran towards it while it turned on sensing me. I lifted my hand towards the being which did the same. Knowing what happened the last time, I braced myself for the horrendous sights I had to see while I closed my eyes. Then I again saw the sights of violets smeared with blood, a pair of teary eyes in rage staring into the horizon, a beach, a desert at night with the sky having nine paths emerging from one point and an army of beings just like the one in front of me walking towards a large wall. After that, I opened my eyes to see me and the being in the same situation as before, our hands in contact. The creature, who stared at me in curiosity, said two words in a very deep beastly voice which made me shiver
"Eren…Yeager."
I then stammered slowly
"T-That's…me."
He then said a few more words as he brought the index finger to my forehead
"Protect…the…freedom…we…fought…for."
He then tapped the finger gently against my forehead, which brought another storm of memories, each of which was more horrible than the previous. I saw eight large beings just like the one in front of me unleashed upon people and a giant centipede-like being with long hair covering the skies hovering in the air, leading a huge army of giant beings. The last sight I saw was the most horrifying of all. I saw my cut-off head with long hair and weird marks being cradled in unknown arms.
It was then the screen went white and I began hearing screams and cries of people in pain. In the midst of this, I heard my voice screaming in my head
"If you lose, you die. If you don't fight, you can't win!"
"Fight!"
"FIGHT!"
At this, I woke up.
