Mave wrote:Question: Am I right to say that the Death Note has no use for someone who is blind, especially one who was blind from birth?
Unless you have some concept of visualization in your mind, yes, the death note would be useless to you.
Mave wrote:Question: Does the Death Note work for someone who can only visualize the target when he was young? Ok, I want to kill Dude A coz as a kid, he bullied the crud out of me. I haven't seen Dude A for ages but I know his name. Can I still kill him if I remember his younger face and wrote his name down?
No, you need to visualize what they currently look like.
And as for writing down Satan's name, I was under the impression that the death note only took effect on beings on our plane of existance. Satan, being an archtypal heavenly being on the level of, say, angels, would be beyond our reach, even if we knew his name and face.