one of my players is playing a paladin. he came up with a really nice character background. part of the background involves an heirloom sword. we discussed it and he'd like to level the weapon, similar to to the samurai class ability. there was an article in a back issue of dragon explaining how to do this and i don't have it in front of me but if i'm correct it requires the player pay for the leveled weapon with experience, which he doesn't want to do. does anyone know of a prestige class that allows for a leveled weapon class ability? any other suggestions on how to handle this?