The Last of Us Part 2 features many gruesome foes You're going to need to unleash everything you have: pipe bombs, shotgun blasts, any flamethrower fuel, you need to use it all just to have any chance of survival. The Rat King doesn't have a 'weakness' in the sense that the others do. As such, it's not so much a stage of infected as it is a horrifying, unnatural anathema. Multiple infected, including at least one Bloater and one Stalker, have fused together, resulting into a multiple-armed, multiple-mouthed abomination. Named for the rare Rat King phenomena that has taken place in the animal kingdom, the Rat King is the stuff of nightmares.