I figured the dragon long had fit the bill for that pretty well. But speaking of ninja weapons, I wouldn't mind seeing a sickle on a chain. You could throw it outward to strike enemies from a distance, and its special attack could have glowing and spinning of the weapon before swinging it vertically in a big earth-smashing slash (earth-smashing as in the cool red glowing flash effect appearing to bisect the opponent). My other invisioned attack would be for it to go in the ground, with multiple sickles bursting up from the ground a second later. That could even be a new magic spell.