My classmate and I talked about the old animes that we've watched, and we were reminiscing about the anime about a character that has a white haired man spirit. On his arm, there's something that's coming out of it. I remember that the ones that are coming out from his hand is his power. We forgot the title and the name of the lead character though.
1 Answer
It might be Shaman King. The anime ran from 2001-2002, which may qualify as old.
Asakura Yoh is a Shaman who uses the spirit of Amidamaru, a long dead samurai with white hair, during the Shaman Fights.
Sometimes, mostly early in the first season, Yoh and Amidamaru combine in such a way that their power comes out of Yoh's hands.
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The "thing on his arm" could also be an Oracle Bell - here's a clear image of one of the other shamans wearing his, and a blurry one of Yoh with his orange Oracle Bell– IzkataFeb 18, 2018 at 20:22
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(The second image in the answer is actually from the episode where Yoh earns his Oracle Bell)– IzkataFeb 18, 2018 at 20:22