Skate

I'm a big fan of skateboard and this is the way I like it. Something old school in it.
I like drawings, and the animation are good anyway. Well done.

I like the Lion

I like the way you draw even you need more practice, it's like in baby books (in a good way).
The end comes too early I think, you should spend more time
on your ideas before making your movie.

Kill the dragon

It sounds really good. It fits well with that quest you talk about, with Gods. I would certainly add some dragons.
I do not really like the intro, it doesn't match the aggressiveness/fighting feeling I've got when I listen to your song.

What you've managed to do really good is that though the song's got a fighting melody, it's still soft to the ear and it doesn't bother a loop listening, for instance in a video game.

It's maybe a bit long for the few different variations I could define. Maybe shorter (song and intro) would be better, I guess. But it's all personal.

Good job !