It WAS looking good, until....
It really was looking good. Great animation, decent voices, seemingly ok story, and an odd fight to the finish situation. They were fighting, blah blah blah, grim outlook for the hero.
But than what happened? The paladin had that huge battle of getting his ASS handed to him, and than in the course of 3 seconds he kills the enemy. Touched sword, decapitated, end.
I'm sorry, but there's a huge difference between a good ending and a terrible climax, and this was the latter. He gets stabbed in the gut when he's in a child's body and laughs it off, but merely touching the sword? Nope, that's gotta be fatal. He's supposedly stronger than ever and than just gets killed in a split second.
Your ending had no "battle" or climax. Just an asswhooping and than a poor plot device to end it, and I'm afraid I was strongly dissapointed.
Don't get me wrong, your animation in general was not bad. As I said earlier, good animation, good voices, great overall. But please, please, PLEASE, in the future, if you make another animation, have someone else write your ending. My apologies if this seemed rude.