1x09 Temari Demon and Arrow Demon

nezuko is so damn kawaii.

That might seem like a strange thing to say, but the attacks are beautiful to watch, they really are!
A lot of anime have really good animation and ufotable proved their talent and dedication with Fate/Zero, but this is the first show (I can remember right now) that is not only impressive in its animation, but... beautiful.
And yes, Shingeki no Kyojin is something to behold as it is really impressive and has that wow-effect. But the water forms here are just a beauty.

This was an absolute masterpiece