Oh my gosh, you captured the feelings so well! I like how you twist from fear, creepiness, etc. to pain and loss...the whole poem makes me want to shudder. In a good way :) The line "Horror as green lifts the man" was one of my favorites. So were the first and last lines.
The only thing I might add is something tearjerky about Dumbledore, maybe adding something with "a last heroic act" or the like, about trying to save Draco even with his dying breath...("Severus, please,") ...although I guess it might not go with your poem since it's not about the locket.
Author's Response: Jenny, thank you!!!!! I am so glad to see that you like this poem. It was written during the summer last year, actually, in a means of trying to shorten my poetry. :) And I challenged myself to use haikus. Keep reading and writing!