Gruman

When Leo's younger brother vanishes, a strange black residue is all that remains. Soon, students begin turning on one another with sudden, controlled brutality. Bones crack against metal. Skin splits on gravel. Blood disappears into old wood as if the town itself is feeding. At the center stands Silas, calm, composed, and watching. The truth lies beneath the abandoned mine and in a century-old betrayal that never faded.
Something has returned to claim what it was denied. To stop it, Leo must confront the one thing more dangerous than the entity itself:The blood that binds him to it.