What are your favorite fight scenes of all time in any anime?

Anime: Kuroshitsuji ll (Black Butler ll)
Fight between: Sebastian vs Claude
Episode: 12

Anime: Fairy Tail
The Two Characters Fighting: Leo the Lion (Loke) V.S Capricorn the Goat
Episode: 107-108

SPOILER don't watch or read if your going to watch Deltora Quest

Anime: Deltora Quest

Fighting: Dain (villain) and Lief (Hero)

Episode: 48, who is Dain

I could only find the real episode not, a amv or anything.

So if you want to watch the fight go to 11:30 into the video

The ending fight in Wolf's Rain...

FMA
Ed and Father
Last episode.

You can skip to 1:54 lol that's my favorite part

Sorry, but I don't have a video or episode name but I loved this:
Fairy Tail & Laxus vs. Master Hades

it's a tie between the fight where Hitsugaya fought Halibel from Bleach & Shu vs Zola from Blue Dragon.

Hitsugaya fought Halibel in many episodes (too many to write down & yes it was only one fight)
Shu fights Zola in episode 51 (first season) it's epic & tragic at the same time.