Sierra Mikain is small galaxy-level power and FTL. Her Moon Rune, one of the 27 True Runes, bestows various abilities: it grants her vampirism, immunity to conventional attacks and magic, rendering her nearly invincible. She can sense the undead, drain blood to heal and draw power, harness energy from the forces of night, and manipulate energy, typically manifesting as crescent-shaped blasts. Sierra can transform into a bat or multiple bats, summon clones or doppelgangers, raise or create undead creatures, and even cause a lunar eclipse. Additionally, she is immune to diseases and ailments, more resistant to typical vampire weaknesses (like holy weapons), and can withstand sunlight without harm.