Wood Release: Reaping Forest

Yūmei surfaces a black forest, best described as an alien world shrouded by darkness even in daylight, ranging up to fifty kilometers in diameter. It is transformed into a massive predatory being with a mind and will, causing it to "move" over entire areas and towns, and absorb all the blood from the wounds of creatures and people within the area. Anything unfortunate enough to find itself inside it is collectively attacked by the trees and plants, acting like free-form weapons, from all angles, is completely swarmed and covered within a minute. The air can also become poisonous to cut off all escape those who enter, so all who have been caught have never survived.

The blood from its victims flows through the forest, causing trees and other vegetation to be dyed with a dark-red coloration resembling an animal's innards. The roots and trees secrete blood as if it were sap, and the forest constantly growls like a bloodthirsty beast. There is a single red fruit growing on a large tree within the forest's center which can grant a person temporary immortality, having become the essence of the harvested blood of its victims and the thousands of animals that once inhabited the forest. This acts as a light trap that has drawn a countless number of people into the forest to never return. The entire forest is a living being unable to be killed by normal concepts, and its core is impossible to find due to the constant movement of the forest. The forest feeds off the natural environmental energy, making it nearly impossible for senjutsu and similar abilities to be used within its confines.