What anime is this? kid fighting a knife-throwing witch and discovers a power within himself – to conjure fire?
I saw an AMV a couple of years ago (about 2 years ago), it featured a kid trying to protect his girlfriend against some witch that throws knives at him, he protects himself with his forearms and gets cut, there’s blood so it is sorta gore-y. After awhile of fighting her, he reveals a power within himself, the power to conjure fire with his hands and defeats her, she then reveals herself as a good character and talks to him, the AMV ends there.
flame of recca,
Recca Hanabishi is a ninja, but is nearly killed in an accident. However, a girl named Yanagi heals him with her powers. Later, the two are tracked down by a woman who attacks them. She tells Recca to ignite his flame, but he is clueless. Just as she hurts Yanagi, Recca releases a powerful flame upon the woman. She is excited to see this. It turns out that Recca was a baby, from the Hokage Clan of the past, that was sent to the future in order to escape death. Now, Recca is the leader of the new Hokage Clan who must stop his half brother, Kurei, from kidnapping Yanagi.
you can watch at http://www.animecrazy.net/flame-of-recca-anime/
How to throw knives – Throwing different types of knives