Senju Beans

This is a pill created after years of tries, the making of Athos. The man created a pill that is based off of Senju DNA, taking it's vitality and increasing it. Due to this, when this bean is taken, it reacts to the chakra pool and suddenly gets a large boost, causing the pool to increase in size suddenly. This boost in chakra is then almost instantly used up to heal all ailments, injuries, and to completely replenish the user's chakra system. Due to the sudden increase in chakra, this 'bean' can also break some of the strongest Genjutsu, although the pill would have to be given to the person under a genjutsu by another.

Due to the way that the chakra pool is suddenly stretched, the strain makes it so that the person cannot take another bean without suffering almost permanent damage to their chakra system, limiting the usage for every person.