Best fight in Fate: Iskandar vs. Gilgamesh

Iskandar vs. Gilgamesh in Fate/Zero is the most epic and emotional fight in all of Fate series!  What makes this fight so great is the mutual bond and respect that these two kings have for each other.
Iskandar knew that he would die but he charged on anyway.  What a king!  One can't ignore such bravery of a man who charged forth all alone to a glory far away on the horizon bathing in eternal sunlight.  A king worthy of leading all people standing firm behind him.  A king is there to lead, and people are to follow this conquest path to the Sun. A king can show how glorious life can be, and his people can decide for themselves to live to the ending days in glory.

In this fight, Gilgamesh looked a little sad - no triumphant laugh, no condescending comment, no joy, nothing - when he opened his Gate of Babylon to kill - an expression that Gil has never shown in any other fights so far - because he admired Iskandar's bravery and probably because Iskandar had proposed friendship to him just before the fight.

From the Fate/Zero novel:

To his worthy opponent, whose entire body was skewered from head to toe by the rain of Noble Phantasms, yet who did not stop until thwarted by the Chain of Heaven, the King of Heroes gave his greatest reward – he honored him with true feelings of admiration.

Gilgamesh showed appreciation for his fellow King’s efforts and praised Waver's loyalty. He also mostly forgot his trademark "zasshu/mongrel" even when addressing Waver). He let Ea be stained by Iskandar's blood to allow him an honorable death. I found his last words to Iskandar to be especially touching somehow: telling the whole world is simply his Garden (nice reference to the Hanging Gardens of Babylon), but adding that Iskandar will definitely never tire of it – basically accepting Iskandar claim to try and conquer it – was a pretty nice touch!

One could never think that Gilgamesh is the only one who spared a Master's life in this bloody War.  He spared Waver out of respect and admiration for Iskandar (for Iskandar was a king who inspired his people, and Waver was a living proof of that), and also out of admiration for Waver's loyalty.

"... If I challenge you, I would die."
"Of course."
"I can't do that. I was ordered to live."
Yes - he couldn't die. Not now, when the last words entrusted to him by the King were engraved into his heart.
Waver must escape from this dilemma no matter what. He was before an enemy Servant and had no way to defend himself; even though it was a desperate situation where nothing could be done - the one thing he definitely could not do was give up. He could not ignore the way he had made the oath.
And that was perhaps a pain far more cruel than resigning himself to death.
The boy shook helplessly before the death he could not escape from, but his gaze alone made his adamance known. Looking down wordlessly on that too-small stature for a short while, Gilgamesh simply nodded once.
"The path of devotion is a great labor. Do not ever mar it!"
He had no reason to raise his hand against a mongrel who was neither Master nor traitor. That was his decision as the King.

In any other circumstances, these two kings would be drinking buddies. If there were no Enkidu, Gilgamesh would have been friends with Iskandar, which is something no else can say. (Iskandar's charisma was so strong that it worked on a demi-god! LOL).

The OST in this scene is "You Are My King".

PS:  Ufotable's animation quality is amazing!