The Great War has started, and a few important stories remain to be narrated in the final Season 8. Some of our favorite characters will die, some will rise. Some will fulfill the destiny, some will become better but some of them will become darker. All the humans and the living beings will be in one camp. The Night King, The White Walkers, the dragon Viserion and the huge army of the undead will be on the other side. They would take part in some epic battle(s). That battle will resolve and spell the fate of the Westeros and the world of "Game of Thrones".

The Night King

The Night King is a remarkable creature. He was human long time ago, but now he has a strong desire to destroy the world of the living. Fans speculate about his future, but he will be destroyed in the end of Season 8 of "Game of Thrones". In some epic battle in the final episode, of course. Some ideas may be found in What to expect in Season 8?. The Night King is the ultimate evil force in "Game of Thrones". As the very name suggests The Night King is very dark.

The Night King is a kind of the monster created by The Children of Forest, thousands of years ago. They used the darkest magic and created the ultimate weapon. A weapon which should have been used against The First Men.

Alas, The Children of Forest's plans backfired and brought the destruction upon the entire race of The Children of Forest. So, who could destroy The Night King? My best guess would be a hero or a heroine who possesses a Valyrian sword. Or even better, the pair or the group of heroes with the Valyrian swords.

Jon Snow (birth name Aegon Targaryen)

Jon Snow possesses Longclaw, the ancestral sword of The House Mormont. He is one of the main characters in “Game of Thrones” saga, but also one of the greatest heroes, and the resurrected one. Such theory is explained in Season 8 endgame theory. I would place the bet on him together with some other persons.

Jaime Lannister

Jaime Lannister possesses Widow's Wail. It is one of two swords made from The Ice, ancestral sword of The House Stark. He is a kind of a great warrior but also a kind of tragic figure in the Westeros and the world of "Game of Thrones". He will play an important role in the demise of The Night King.

Brienne of Tarth

Brienne of Tarth possesses Oathkeeper. Jaime Lannister gave Oathkeeper to her, as a sign of trust and mutual respect. Jaime Lannister and Brienne of Tarth had a special respect and understanding. She is ready to die defending The Stark sisters.

Samwell Tarly

Samwell Tarly possesses Heartsbane, the ancestral sword of The House Tarly. He is going to give his sword to someone else, who is a far better warrior.

He is intelligent and smart, so his power lies in his brain.

Arya Stark

Arya Stark possesses Catspaw, the dagger made of Valyrian steel. Arya Stark will play some important role, but not the major role in destroying The Night King. She would keep her sister and family safe.

But there are a few other candidates... Bran Stark deserves a special consideration, maybe in a new article.