拥有黑色翅膀的恶魔拥有纯白翅膀的天使
[yōng yŏu hēi sè chì băng de è mó yōng yŏu chún bái chì băng de tiān shĭ]
Describing oneself or others having dual characteristics - having black wings symbolizes demonic traits, and pure white wings symbolize angelic ones. It implies possessing both malevolent and benevolent attributes.