Arrow of Greed

The user channels chakra through his/her cursed arm and feeds it into a arrow. The patch of skin surrounding the location where the arrow hits the target is blackened like the user’s cursed arm, limiting the amount of stamina (chakra) that the opponent can tap into, permanently, until the curse is lifted. This effectively reduces the opponents stamina by 1 point.  
The curse, however, spreads faster through Chakra which brings us to the secondary effect of this arrow. As soon as this cursed arrow hits a chakra based substance such as a Fire Ball Ninjutsu, it will weaken and slow down: causing some of the chakra to fall to the ground in the form of a black ooze. This reduces the acting rank of the opposing Ninjutsu by one step in terms of its potency: B-Rank would become C-Rank. 
===Strengths:===
Accumulative usage when hitting the target with multiple Arrows of Greed. (Although this strains the Stamina, due to the technique having to be used multiple times.) 
===Weakness:===
The Curse can be lifted. To lift the curse, one requires proficiency in Kinjutsu which equals the rank of the original curse. (One must have 13 ninjutsu stat points, and have a A-rank or higher Kinjutsu technique in his/her arsenal, in order to have the minimum required knowledge to look for a way to lift the curse: which can then be handled narratively depending on DM’s/Roleplayers, whether through blessing an object or creating a new seal or performing some unorthodox ritual.) 
The curse takes no effect on those who are truly evil: only blackening their skin without further detrimental effect other than being marked.