Given a multiverse that exists as a projection/hologram/simulation of a super sentience, how could a character in a type 3 (or 4) society that exists in apparent 3 dimensions of space and 1 of time (like ours) actually leave the universe entirely.
Context and suppositions. The universe in question exists within an infinite multiverse and also has a mirror universe, that at the moment of its inception created a mirror universe where time flows in the opposite direction. This universe is a closed system. It began with a big bang. Distance and time between all universes in this multiverse is irrelevant, since each universe exists at a different plane; essentially the super sentience either IS or exists in dimensions unfathomable or incomprehensible to anything existing. In plain English, I am using our current time space continuum and universe as a template, and want to know a way that you could literally break a hole in reality to escape to those unfathomable dimensions.
EDIT: to specify, I'm seeking plausible ideas from cosmology and theoretical physics that could potentially cause an apocalyptic event in another part of the universe, say a neighboring galaxy, that could change the laws of physics. (E.G. creating a white hole, quantum tunneling a Higgs boson from false vacuum to true vacuum and thus causing vacuum decay) I planned on doing this by "breaking a hole in reality" with this literary mechanism to change the laws of physics