It Comes by Night

Plot:

A mysterious creature is draining the energy from all the slugs in a distant cavern, and the residents are offering a rich reward to whoever can stop it. Mercenaries come out of the woodwork hoping for the prize, but the Shane Gang aim to stop it for free. That's what they do. It turns out this creature is more dangerous than anyone could imagine, and one by one, the hunters are taken out of the game - leaving only Eli and the reviled STOCKER remaining. The two forge an uneasy alliance, but can a mercenary like Stocker really be trusted?