Final answer:
The consequence of Hecate casting a spell on a moon droplet is not factual and depends on the fictional or mythological context. Options such as turning the droplet into an elixir or making it glow in the dark are plausible in a magical narrative.
Step-by-step explanation:
The question seems to be related to a mythical or fictional context, likely involving witchcraft or magical themes involving the character Hecate, who in mythology is known for her association with magic, witchcraft, and spells. The potential consequences of Hecate casting a spell on a moon droplet are fantastical and not grounded in reality; thus, it is important to understand the source material or the context in which this question is asked, as the answer can vary greatly depending on that context.
Considering the options given, if we were to assume a mythological or literary text is being referenced where Hecate's spell would have readily discernible effects, one could choose an option that aligns with known attributes of Hecate in myth or fiction. For example, if Hecate were to cast a spell on a moon droplet in a story, it could plausibly turn into a powerful elixir or cause the droplet to glow in the dark, both of which are results befitting magical occurrences. However, without specific text or story, this remains speculative, and an accurate answer requires context from the source material.