Multiverse

Summary
A Multiverse is a hypothetical set of infinite or finite possible universes that together can comprise anything from a comparatively simple collection of parallel 4-dimensional universal space-time continuums, to our own likely 11-dimensional multiversal structure, or sometimes even higher levels of reality.

This includes the entirety of space and time within a certain continuum, as well as the physical laws and constants that describe them.

What's important is that it doesn't matter how many space-time continuums you destroy, what matters is that one can destroy multiple space-time continuums.