Spellbook Demonslayers is a roguelite bullet heaven / horde survival game inspired by Vampire Survivors and Path of Exile. Combine active SPELLS & passive AURAS — and take risks with ILLEGAL Upgrades! Aim Spells Automatically OR Manually — slay demons the way YOU want! Customize your UPGRADE route — Evolve or Mutate your spells & auras to unlock unique effects! Choose your DIFFICULTY — Customizable challenges let you earn greater rewards!Steal the powers of slain demons, Headhunter style!