New Terra
New Terra is accessible from Victoria through a nexus at Grand Central Station. You have to take the train just before midnight and you will find yourself, presently, in the other realm.
New Terra is a world of four colour pulp action. It is a place where science is not rigorous. Results cannot be repeated easily, except by the scientist who discovered the principle.
A few of New Terra's laws of the universe are understood:
Most mortals who witness magic or acts of great power are deranged by the event to some degree or other. The greater the power, the greater the derangement. Usually, this derangement manifests as the mortal forgetting whatever it was they witnessed.
Occasionally, it can manifest in the development of an actual mad scientist, and God help us all.
The powers of immortals are substantially reduced in this realm, being divided by 2, and any fractions truncated.
Notable people on this plane are David, the Lord of Artificing, and Halos, the Lord of Swarms. David is the leader of a powerful faction known as the House of David. Members are intensely loyal, and invitation is mostly by scionage.
There is a curse in place that is triggered whenever an immortal boards an aeroplane. This curse takes the form of what hex-masters call a 'Murphy Effect'. Effectively, when the curse is activated, if something can go wrong, it will.
There is a report of an aeroplane carrying an immortal being struck by a meteorite, which then fell towards the caldera of a suddenly active volcano. The pilot heroically pulled the nose of the 'plane up so that it would breast the rim of the cone, whereupon the fuel tanks exploded and the wings fell off.
Most immortals, when they need to fly, use zeppelins. Or they walk. Walking is good.