Allura

Allura are reptiles that use a limited shapechanging power to pass as gorgeous women of their victims' race, usually human, always in rich clothes and dazzling jewelry. Magic that sees through illusion does not reveal them.

They live on the emotions of fear, tension and excitement. Each can cast, once per day at 12th level, charm person, clairaudience, clairvoyance, delude, demand, friends, mass suggestion, sleep and suggestion. They also innately detect life within 500 feet.

When a starship enters their area they use clairvoyance to find the wizard at its helm and demand to call him closer, then pose as wreck survivors or escaped slaves once the ship arrives. Aboard, they quietly seize key crew with spells. Victims save normally, but a failed casting is quickly backed up by another allura, and anyone still resisting meets weapons and attack spells.

With the crew in hand, they conjure illusions of battle or the void's perils to keep emotions high. In one tale, a crew they controlled hurled its dragonship at a web-eel slaver warship and was destroyed, leaving the allura well fed.

After two weeks of this emotional vampirism the crew grows listless, with Strength, Constitution and Intelligence temporarily halved. The allura then incapacitate the spent survivors, maroon them on the nearest asteroid, and drift on in the empty ship, which they cannot fly, waiting for new prey.

A group of allura stays together for life. Spacers' tales claim they are immortal, forever chasing greater danger, stronger feelings and fresh experiences.

If they go four months without feeding, their beauty decays and their true reptilian shape shows. Thus diminished, they hide from an arriving ship, goad one crew member into fighting another, and feed on the result to restore their looks in 2d4 rounds.