The Gharal

When they landed, there was hesitation. They were eyed with suspicion, but some embraced them. The slug-like alien beings required hosts to survive; they were essentially parasites, but they also returned substances to the host's body. When it was found that it was hallucinogenic, there was controversy, but more humans began to function as hosts. The Gharal paid the hosts a fee as well, and were able to attach themselves that they did not overwhelm the human's functions. Nonetheless, there were rogue hosts, who forced their Gharal, under threat of removal or death, to inject them with their drugs. The effect was sometimes brain damaging. and hosts were inevitably found in a comatose state, perpetually encased in the hallucinogenic state.