Diana: My father hid Themyscira from the world, and I have been trying to learn how he did it.
Steve: Did what?
Diana: Made something invisible. But in 50 years, I've only done it once.
Steve: Well now is not a bad time to start trying. How long does it last?
Diana: I don't know. It was just a coffee cup and I lost it.
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From: Wonder Woman 1984