Jemarcu

When the immortal and nearly invulnerable psychopath Balor is unleashed on Alpha, Nick and Nat try to stop him without revealing their vampiric nature. Can even an 800 year old vampire hope to stand up in the face of Balor's power?
A "filler" for the "Forever Alpha" crossover series by the great and venerable Andrew Caruthers, whose help in editing and improvement was much appreciated.

A space warp puts the moon back into Earth orbit, in the 40th century! A routine survey party lands to make first contact with what looks like a village of primitive humans. But things do not go as planned.