His shadows curled around him and let him down gently, then they shot at China. She clapped her hands together and the tattoos on her palms touched and mingled and a yellow barrier went up. The shadows struck the barrier and China grunted, but the barrier held.
[...]
They sprinted for the main hospital building. Valkyrie looked over at the battle, saw a trail of shadows sneak around behind China, attack the barrier from there. The barrier was weakening. China dropped to one knee, her hands still flat against each other.
Valkyrie held on to Skulduggery, and the air rippled and they shot up to the rooftop.