Venom learned human language, felt human emotions, but didn't learn to lie-it told humans their weakness-fear of noise and fire.
Of course, this also indirectly helped Venom herself - Anne helped Venom by amplifying high-frequency noise to distract Ugly when she was absolutely downwind in the battle. Anne didn't have the idea of killing Venom. Just imagine that if a certain earth person or organization wants to exterminate all the Venom clan on the earth, they only need to burn their hosts-it is very unfavorable for the Venom clan.
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