[Cain doesn't normally go out of his way to intentionally hurt himself. But for the sake of demonstration, he'll do it just this once. He peels off his glove, reaches into his pocket, pricks his finger open on his shelter door key. Without hesitating a moment, he grabs Eridan's wrist and smears the pinpoint of blood onto the back of the troll's hand.] Look, how terrifying and mutant. It's blood. Trillions of humans have it. And now I got it on you.