"I'll heal," says Kell, for he will, albeit much more slowly without magic. He will bind his arms and apply his salves, and though it won't be a pleasant recuperation, he'll hardly die.

Kell looks at Sirius' wand, and broken though it is, he can understand the shape of it now - the hollow space meant to be a vessel to contain and focus magic. All that's missing is its center.

"What makes a core for these?"