Being in great despair, Bran kept falling into one vision from another.
He was not able to control them, nor was he able to get out of them.
He was stuck deeply. He couldn't forgive himself for killing all the ones who loved him, out of his stubbornness. Hodor, being the one who didn't only die because of him, but was traumatized for all his life because of Bran.
And Summer. His lifelong companion. The one who saved him on several occasions.
The one who felt pure love for him without ever asking something in return.
The one who gave his life for Bran. That's how strong this unconditional love was.
Nothing hit him harder than that realization. That Summer died. Because of one foolish mistake. He didn't know if he could ever forgive himself for that.
His heart still aching, unable to move any of his body parts, he again opened his eyes slowly.
The view was frightening. So frightening it seemed to squeeze his heart until it breaks and all you would see is splattering pieces of himself all over the place.
He wished for nothing more than to escape from this vision.
This was the cause of the death of his dear ones.
Seeing no more than whiteness everywhere, filled with that intense cold touch of death. He was among the White Walkers again.
He stood up rapidly, turning around to witness the gruesome face of death all over again.
The living dead were standing in perfect lines, just the same as they stood last time, facing their Night King who was sitting on a horse.
Shockingly, he saw the previous Bran, couple of seconds later appearing in the crowd of White Walkers. The picture of himself was walking among the White Walkers, towards the Night King, not realizing that this one could actually see him.
He ended up being touched by the White King. After the touch, he disappeared.
The Night King pointed a finger towards South, were all of the White Walkers started to run crazily, just uncontrollably.
Seeing all of this taking place from the outer perspective made Bran just fall on the ground again, putting his arms around himself and crying from the lungs.
He just kept crying. Suddenly, he heard a voice.
The familiar voice of a beloved one.
This time, the tone being darker. The tone of the voice promising death to whatever was alive.
Summer.
