“Hurry, Cécile!” Tristan had me by the hand and was dragging me through the tunnels, but I kept my head turned back, watching the sluag as we rounded a corner. “Why isn’t it attacking? What’s it waiting for?”

“For me to die.”

My head snapped back around and only then did I see the blood running down his hand, dripping onto the ground. “No,” I whispered, and every inch of me grew cold as I remembered Élise’s words: their venom is deadly – even to one of us. “You can’t die.”

“It can’t be helped,” he said. “There is nothing that can be done.” I could see the tightness in his face, feel the fear and anguish in his heart, but I knew he’d never admit any of it. Anger at his fatalism drove away my terror. Trolls did little to help their injured, leaving it up to fate to determine whether the victim lived or died. But I wasn’t a troll. I’d seen village wise women pull men back from the brink of death with herb-lore. More importantly, I’d seen my father save one of our neighbors from a viper bite that would surely have killed him untreated.

“Stop,” I said, pulling Tristan to a halt.

“Have you lost your mind?” Tristan hissed.

I pulled up his sleeve, exposing the puncture wound. It was small, but already the skin around it was inflamed. Tearing a strip of fabric from my cloak, I tightly bound his arm beneath his elbow. “It’s just like a snake-bite,” I whispered. “Just like a snake-bite.” Taking a deep breath, I raised his arm to my mouth and sucked on it hard like I’d seen my father do. The faintly metallic taste of blood filled my mouth, but it was foul with the bitterness of poison.

Tristan jerked his arm away, horror on his face. “Do you want to die too?”

I spat the noxious mixture onto the ground and gripped his arm again. “This is how it’s done. It’s just like a snakebite.” I repeated the process until all I could taste was blood, but still the inflammation grew. “Knife,” I ordered. He pulled one from his boot and handed it to me.

“This will hurt,” I warned, and then made a series of cuts around the wound and left it to bleed freely. Tristan didn’t flinch, but I could feel that he was in more pain than the knife cuts warranted. “You need to stay still now,” I said. “Wait for them to find us.”

On the tail of my words came the soft swish, swish from the tunnel behind us. The sluag was on the move, tracking its injured prey.

“I don’t think that’s advisable,” Tristan said, and he pressed the palm of his hand against his forehead.

I felt his dizziness and pain like it was my own and rested a hand against the wet rock to keep my balance. “Perhaps not.”

“We need to move,” Tristan responded, refusing to look at me. “There isn’t much time.”