Wind knot grass

In a beastman dream realm, captives receive wind knot grass as a tribal trial. Those who untie it are treated as people blessed by heaven and spared. Those who fail become food. ^{ch. 912}

The grass is like a lantern, a round ball-shaped grass lantern, rare to see in modern times. There is no wind knot grass in the five regions. It is a type of grass only found in green heaven of the immemorial nine heavens. Fragments of immemorial green heaven fell into the five regions after Ren Zu’s ten children destroyed the immemorial nine heavens. ^{ch. 912}

Each lantern is made from roots, leaves, and stems intertwined into a mysterious ball. In immemorial green heaven, winds blow all year from strange directions and angles. Plants are uprooted or shaved bare, and the twigs intertwine in the wind until they form the ball-shaped grass lantern. ^{ch. 912}

To untie the grass without brute strength, one needs confidence, good perception, deduction with the brain, patience, ample time, and some luck. The knot has layered structure. At the core sits a seed, the self-defense mechanism of plants in immemorial green heaven and a way to use the wind for dispersal. Taking out the seed completes the untying. ^{ch. 913}