A monster released by melting Artic ice (from climate change) kills all humans who cross their path. They melt them with their melting flesh, dripping flesh onto their victims faces which acts as an extreme acid alike to reaction from touching dry ice for too long. They look to be visually melting. Can adapt, which means they can’t be melted. This is helped by the fact they have a below zero core. (Sorry if this doesn’t make sense lol.)