AVP Prey 30

The warrior dipped one claw into the alien blood and then spat on the claw. His own blood mixed with the alien's acidic ichor. That was part of it. His blood would partly neutralize the potent chemicals from the Hard Meat. Moving with great care, he reached out and etched his mark into her pale skin, on the forehead, between her eyes. He managed to keep his hand from shaking long enough to draw his symbol.-pg.249 chpt.30