A lesser god looks up from where He stands near the base of Pharasma's Spire, that is the foundation of the Great Beyond; He has passed in a flash by distant suns and the surface layers of planes, and hidden away encapsulated strangelets and other catastrophes, whose dead-man triggers are in Golarion where prophecy is shattered; and near about the base of Pharasma's Spire there are now hidden the frozen potentia of thunderbolt singularities and relativistic death waves, true-vacuums and single-quarks and assorted other kinds of physics disaster—
We're beginning to suspect that, rather than merely having different physics, y'all simply don't know what the ass words mean.
Okay. Okay. If, hypothetically, your universe had a neighboring brane with a lower vacuum energy density, it might make sense to call that the "negative" "energy" "plane", and any ordinary matter brought there would spontaneously decay, which might have lead you to claim that the true-vacuum contains "pure entropy" if you only sort of understand what entropy is.
So, then, if Keltham creates a rift to the Negative Energy Plane not enclosed by an event horizon, it should trigger bubble nucleation—
Patched in beta 0.14. We had a little bit of a hiccup the first time someone tried out the 'undead' mechanic, but that's fixed now.