Black Magic Kush is also known simply as Black Magic. It's an indica-heavy hybrid with a sativa/indica ratio of no more than 30:70. THC levels can be quite high, above 17% in some tests. CBD is much less plentiful in this strain, significantly less than 1%.
In other words, Black Magic Kush isn't recommended as a medication for seizures or other conditions that require CBD preparations. However, it's a good strain for treating anxiety, depression, other mood disorders, chronic pain, and stress.
The indica body high is buzzy, calming, and sleepy, with intense couch-lock effects. There are also psychoactive qualities to the high. It's hard to find much information on the side effects this strain causes, but dry mouth and dry eyes are probably among them. The smell is pungent and sweet, with notes of grape, while the flavor is fruity and sweet.
The forest-green nugs are covered with splotches of purple, dark orange hairs, and a layer of resinous trichomes. Black Magic Kush can be found in San Diego and possibly elsewhere on the West Coast; in most other places it's rare.