A Blood Keep is structured similarly to that of a Mayan or Aztecan temple. The outside, composed of bricks the color of dried blood, has stairs that lead to the top; a worshipping area, one would assume. Inside, the Keep is filled with traps and twisting hallways. Should one reach the center, it typically contains a powerful artifact, a Hell tablet containing a well-guarded secret, or anything else Hell's legions would prefer to keep hidden away. Blood Keeps are also well-known for their tombs, buried deep within the Keep and containing upwards of a thousand Hellish corpses.
I took a deep breath and began charging towards the Blood Keep. Demons poured from the Keep in a desperate attempt to defend the sacred temple. Each one that charged me fell with smoking holes where they'd been shot. When my supply of bullets became depleted, I drew the Unmaker. I fired the weapon at the stragglers, turning them into smoldering piles of meat.
The endless flow of demons came to a halt. Either I'd eliminated every demon in the area, or the rest were lying in wait inside the Keep. I walked into the Blood Keep, wary of the traps I'd undoubtedly find. The twisting halls were dark and scarcely-lit by dim, blue torches.
For the first time in eons, I felt uneasy. The air felt heavy with dread. Something about this place radiated a tangible sense of inescapable evil. Further in the Keep, the walls had demonscript scratched into them. I slid my hand across the etchings, translating them as I went.
The demonscript was shoddy and I couldn't make much of it out. One word was repeated time and time again: "Witness." I couldn't translate much more, as the etchings were hastily-made, as if rushed. As I slid my hand across the script, I felt something not part of the demonic alphabet: a large, long claw mark.
It was fresh. If it hadn't been, the small chunks of rock would've fallen out long ago. Something was in here with me. It was leading me – guiding me – towards whatever it wanted me to see or find. I reluctantly followed.
By now, the light from the dim torches had faded and I was relying solely on my hands to navigate. I slid my hand across more of the walls, searching for another claw mark. I managed to find another. It was slightly different from the last; it was etched deeper, as if whatever made it was angered.
The claw marks led me to the Blood Keep's central chamber, which was lit with a few orange torches. On the central pedestal was a small, pentagram-shaped key of sorts. I picked it up and examined it. I had noticed three slots of similar shape on the Unmaker. I shoved the key into the Unmaker and it hummed quietly with newfound power.
On the walls were more claw marks, leading deeper into the Keep. I followed the path that had been laid out for me. Whatever had set this path for me was surely watching silently from the shadows.