My flesh, no nigga could test, my soul is possessed
By D'evils in the form of diamonds and Lexuses

from Jay Z – D'Evils Lyrics on Rap Genius

Meaning

He seeks material possessions and perceives beauty more so in its physical form. The material possessions actually possessed him, so to speak.

The reason he is untouchable (protected, not on the same plane) is because his soul is activated by D'Evils, the poison, The Cabal, Illuminati, etc. He finishes the rhyme by personifying them as diamonds and Lexuses.

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