Young Hellboy: Assault on Castle Death #2 Oeming Variant

Amidst a battle with a mysterious illness, Hellboy is caught in a precarious situation as a Brotherhood agent within the B.P.R.D. positions an assassin alarmingly close. Yet, even in the throes of fever, the young Hellboy harbors a trump card in his (pajama) sleeve... could it be a recognizable calling card?