It was only after making the stroll to the pond and spending some time in pursuit of penguins that Jacob's goddamned common sense started fully filtering back into his brain. It had left him in a zen-like state that was helpful in thwacking penguins with his walking stick to stun them... but after draining one dry (and finding it not all that bad, really), he really looked at Karkat. Looked at him scampering about, no real way to catch his prey. Looked at him, really younger than someone ought to have been embraced. Looked at him...

Holy fuck, did he just... he just used Nightmare on that penguin.

Jacob tosses his own exsanguinated bird aside, and slowly moves to Karkat's side. "Impressive. You're taking to this alarmingly well. Have you been a vampire before?" It's only mostly joking. Apparently the little deity could strip vampirism away. Better check.