妖术, 魔法, 黑人艺术, 黑人美术

[ noun ]
the belief in magical spells that harness occult forces or evil spirits to produce unnatural effects in the world
<noun.cognition>

Black art \Black" art`\
The art practiced by conjurers and witches; necromancy;
conjuration; magic.

Note: This name was given in the Middle Ages to necromancy,
under the idea that the latter term was derived from
niger black, instead of nekro`s, a dead person, and
mantei`a, divination. --Wright.