Bloody showdown with the gang of vampires Harkin has been pursuing for years. Two of the four members of the gang are killed, but Harkin is the sole survivor of his hunter cell.
Knowing that the surviving vampires know he's still out there, Harkin begins to look at alternate tactics to ensure that they die before he does. He studies a new Castigation ritual. He goes to ground.
Harkin becomes the hunted, as the predators seek him out. The only thing that rivals his panicked need to survive is his desire to see the vampires pay for killing his friends. Maybe that way he could stop blaming himself for their ends.
Harkin summons and makes a deal with a powerful Blood Spirit. When they come for Harkin, the spirit will steal the blood from their bodies, rendering them weak. In return, Harkin will make an offering of his own blood to the spirit once a year for the next twenty years.
The vampires are lured into Harkin's trap, and the spirit is as good as its word. It syphons their blood, making them weak, but frenzied. The blood continues to fountain from their bodies into the ether as they charge towards Harkin.
The Lucifuge calls forth in the Dragon's Tongue and enacts his newest trick. His body warps into the towering, winged shape of an elder demon, as he borrows the form and power of his unholy father. The battle form doesn't last very long, but the vampires have lost too much blood to be much of a fight. The demon tears into them, matching their savagery with his own. When the fight ends there is only Harkin and scattered ashes.