Seven Wonders 3-Book Collection

Grinning at Aly, he said, “Follow the Yellow Brick Road.”
Back in the crater, Marco insisted on gathering up all his tooth fragments and lost body parts

He was sitting up now. His arms were moving. The lacerations on his face were looking less angry. “Marco,” I said, “can you stand?”
Marco shrugged. He swung his legs around so they hung down over the ledge.
“Look at them, Jack!” Aly said with a gasp.
His legs dangled bizarrely, pointing every which way as if he had three knees in each one. He glanced at them curiously, swinging them right to left. “Dang,” he said.
Then he kicked out twice, hard. The legs locked themselves back into a normal angle, and he let out sharp yelp of pain.
Cass groaned. “He has got to stop doing that

Returned from death.
“Marco, let me see your mouth,” I finally said.
He obediently lowered his jaw. As I knelt closer, Aly looked, too.
I angled his face so I could catch the light. His front teeth were stubs, just breaking through the gum line. Not smashed, not ragged and pointed, but smooth edged, like Chiclets. The top of Marco’s mouth—the hard palate—was pink and small as if it had been transplanted from a baby.
Aly gasped. “His teeth…”
“His whole jaw,” Cass said softly. “It was shattered in the fall. Destroyed.”
“Marco,” I said, “you may not remember this, but you fell. A huge distance. You should be dead. But you landed by this waterfall, and you’re okay.”
Marco smiled a stubby smile. “I’m immortal?”
“It’s something about the water,” I said. “You’re…regenerating.”
“I whaaaa—?”
He nearly bit off my fingers at the W.
“Your teeth are growing in,” I said