Surge-coral
this variation on yorik coral was used by Yuuzhan Vong priests and military leaders during the ritual of escalation. A small, horn-shape piece of surge-coral was placed inside the shoulder of a worthy Yuuzhan Vong by an implanter, where it was fused to the bone and gave the Yuuzhan Vong a pointed knob at the shoulder which indicated their rank. As a warrior was honored for more and more bravery, he was implanted with more surge-coral. The coral continued to live after implantation, providing a constant and painful reminder of the warrior's service to the Yuuzhan Vong. The Yuuzhan Vong later developed surge-coral which could receive commands form a yammosk, giving the warriors with implants the advantage of working as a well-coordinated unit.