That Which Survives

Investigating what turns out to be a small (about the size of Luna) artificial planet, Kirk, McCoy, Sulu, and a geologist, Lieutenant D'Amato are stranded when the Enterprise suddenly vanishes. D'Amato meets a mysterious woman (an image of Losira) and is killed. It turns out that the woman is produced by the planetoid's defenses--specially crafted for an individual, if she touches them, they will be injured or killed. To D'Amato, she says "I am for you, Lieutenant D'Amato." and "I am only for D'Amato." Those intended for others say e.g., "I am for James T. Kirk."