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Fantastic Four (2022): Reed Richards had plunged the Baxter Building (which the FF were not in, but their kids were) and the surrounding area a single year into the future. Much of the story afterwards dealing with the Richards family grappling with the fact that they are unable to see their kids until the building returns.
Fire Emblem Heroes: the eponymous goddess of the antagonistic Embla empire has the ability to seal away areas into nothingness.
Want to ask if there is an umbrella concept for these disparate cases specially around the idea of separation or severance.