Mass Bloodline Upgrades, 5th Stage 3rd Class Slayer

WAAA!!

The moment the scythe was finished forming, an unbearable aura spread out from Cassius and engulfed both the cave and the space outside. The Nightmare corpses—which he had not bothered to do anything about—were rapidly corroded by this smothering aura. Then, without Cassius commanding it, the blood of the Nightmares—which had previously been uselessly poisonous to both him and Lilith—now flew toward them of its own volition.

In an instant, the blackish-red blood of tens of thousands of Rank 1, 2, and 3 Nightmares swarmed the figure floating ever so slightly off the ground. The countless gallons of blood slipped through the illusion before dividing itself between Master and Blade, urging forth evolution after evolution.