Aliens' Sacrifice

I'm shoved in the ocean for a hungry alien kraken god to snack on. I expect to die. Friendless, hopeless, a billion miles away from home.

I'm resigned to my fate until three silver aliens show up with a grudge to settle and serious weaponry. They save me from becoming a human smorgasbord and fight off the cultists who sent me off to die. They swear to get me off this cursed prison planet before anything else gets a taste for human meat. The problem? I might have a taste for something... for...