Board Thread:Suggestions Forum/@comment-25672535-20150222000505/@comment-26116279-20150222003729

it actually is magic but only a few can use it for offensive or defensive purposes like the istari. the istari are incredibly powerful wizards that are actually maiar so of course they have magic some of the high elves also have this ability as do some men. For example the reason the barrow wights are in the barrow downs is because of the witch king of angmars magic sending evil spirits to the barrows.