I love mythology and fantastic beings, and your use of them snares my interest.

I like how you incorporate so many mythological/magical figures in one poem, too. You do it skillfully, so it doesn't sound meshed together. The flow is great; your wording is rich.

My only suggestion would be with the line 'And darks the Sea with raven locks'. I think 'darkens' would sound better, but then again that's just me. =P

Again, great work!