I can't picture a swamp or a particular monster with this. It's more like a feeling of loss/defeat. It's the sort music I would expect to hear during the final moments of a friend's life, while the hero watches his home slowly burn to the ground, or at the moment when villain's plan has succeeded in bringing darkness across the land. Something like that. Then again, maybe that's just me. Either way, it's a fantastic piece of music. I love it when something you upload makes me immediately think of Chrono Trigger without it having to be a remix of the soundtrack.