“his parabatai rune was bleeding”
“I know about parabatai,” said Magnus, an angry, dark undercurrent to his voice. “I’ve known parabatai so close they were almost the same person; do you know what happens, when one of them dies, to the one that’s left —?”
“Someday, Will, I will go where none can follow me, and I think it will be sooner rather than later. Have you ever asked yourself why I agreed to be your parabatai?”
“Jem knotted his fingers in the material of Will's sleeve. "You are my parabatai," he said, "You said once I could ask anything of you.”
“Jem touched the parabatai rune on his shoulder, through the thin material of his nightshirt. "I am not alone," he said. "Wherever we are, we are as one.”
“I don't know how to live in the world as a Shadowhunter without Will. I don't think i even want to. I am still a parabatai, but my other half is gone.”