Learn what "i'm gonna contaminate your blood" means, when people say it, and how to use it naturally in English.

It is a violent threat meaning the speaker plans to harm the other person in a serious physical way.
From Blood Contract, Episode 32
Someone threatens to infect or contaminate another person.
This is not normal everyday English; it is aggressive and dangerous. Learners should recognize it, not copy it for polite conversation.
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