The vamp is near
Tech refers to himself as a vampire because of his longevity in the rap game. While other rappers might release a couple of albums but then fall out of relevance, Tech has had a pretty consistent growth with his dedicated fan base, called Technicians, due to having one of the most consistent discographies in hip-hop.
He may also referring to his ego and everlasting part in the scene- see his song Alucard.
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