Using Wood Release, the user is able to grow a multitude of heart shaped enormous flowers, these flowers are unusual as they create an irresistible aroma, that changes depending on who is smelling it. Prolonged exposure to this technique will cause the brain, to lose it's control over basic functions, as well as use a powerful pheromone to make beings move toward them. The Solemn Hearts feature a tear drop shaped sac giving them the name, this sac is holding an extremely lethal toxin, that works on proximity, if a target was to approach the plants, or the plants were grown close enough to a person, they will expell a highly pressurized stream of gas/liquid that works as an acid, boiling a target on contact.
Kekkei Genkai, Ninjutsu, Hiden