Blood Ascension: Crimson Sovereign

Kalen Draven, an ordinary human who stumbles into an ancient, hidden world of vampires after being chosen by a dying Crimson Sovereign, the last of an ancient bloodline. Granted the power to become the successor of this long-forgotten lineage, Kalen must navigate a world of blood-soaked hierarchy, fierce battles, and otherworldly enemies, all while trying to protect humanity from impending doom.

Through a game-like interface visible only to him, Kalen levels up, unlocks vampiric powers, and summons unique blood-bound beasts and warriors as he climbs the ranks of vampiric evolution to achieve the title of Crimson Sovereign, the ultimate ruler of vampirekind.