Madara battling the five Kage

Wood Style: Deep Forest Bloom is a jutsu originally created by Hashirama Senju, the First Hokage, using his Wood Style kekkei genkai. It was later, among other jutsu, mastered by his rival, Madara Uchiha after he gained the ability following his defeat. The technique works by either of them properly mixing Water and Earth Style chakra natures together, allowing them to instantly create a forest with flowers whose pollen can render a foe unconscious. This jutsu nearly allowed Madara to kill most the Five Kage when he followed up with a fire jutsu.