I have an enormous civilization spanning a large amount of the universe. It is able to both travel and send information much faster than the speed of light without violating any laws of physics.
Resources are not really a large issue. This civilization, already millions of years old, plans not to reverse or stop the heat death -- they've decided it cannot be stopped -- they plan to slow it down as much as possible, even if they only get a few thousand extra years.
Is there any real way for them to accomplish this without traveling to other universes or breaking laws of physics?