The Bridge to Eternity (Variant Transitive Plane)
In various places around the planes, strange, mushroom-formed structures made from a blue metallic substance can be found. Seemingly indestructable, these 110 feet high mushroom domes, as they are called, form the gates to a even more unusual structure: The Bridge to Eternity.
The Bridge to Eternity appears as a bridge made of graphit boards that hovers within the universe. Visitors can see stars, planets, galaxies and black holes, constant creation and destruction. At each end of the bridge, a foggy field awaits the traveler, through which he may reach other planes or even other material worlds. However, a traveller can only access the world that is currently visible beyond the fog. Some rare artifacts, called passanti, allow to "turn" the bridge to other domes, although some strong-willed characters can do so alone. On occasion, travellers might find a megadome, which lead to pulsating demiplanes where deities can find refuge from even more ancient beings trying to manipulate them.
Bridge Traits
Normal Gravity
Erratic Time: Use the sample table found in the Manual of the Planes to determine the flow of time during a specific visit on the Bridge
Finite Size: The Bridge itself is certainly finite. It is 35 feet wide, and while it seems as if the Bridge stretches endlessly from each end, after about thousand steps (variing from visit to visit), the travellers reach the other side. However, the surrounding universe might be infinite, though no one would try to find out for reasons detailed below.
Alterable Morphic: But travellers rarely find any objects worth manipulating, and the boards of the Bridge are harder than steel.
No Energy or Elemental Traits
Mildy Neutral-Aligned
Selective: Travellers who do not wear a passantum (or being specifically attuned to the Bridge) feel that they are not welcome on the Bridge, which causes them to feel uneasy and might even cause them to jump down from it. This is an unique trait of the Bridge that causes all affected beings to suffer a -2 penalty on Intelligence, Wisdom and Charisma checks while accompanied by an accepted being. If they entered the bridge without such a being, they must make a Will Save (DC 20) or jump from the Brdge, being instantly disintegrated and joining the creation process that takes place around the Bridge. The spell Avoid Planar Effects causes characters to automatically make their Will Save that would cause them to jump from the Bridge, but offers no protection from the penalty on the mental ability scores.
Normal Magic: However, no known form of magic can prevent the disintegration of anything that falls from the Bridge.
Bridge Links
The Bridge to Eternity can only be entered from the mushroom domes, and only by those who either wear a passantum, are specifically attuned to the Bridge or are under the effect of the Enter the Bridge spell. The Bridge is a transitive plane coterminous to all other planes and material worlds. However, without a passantum, most travellers can only reach that one destination that is currently linked to the other side of the Bridge if they don't want to return to their point of origin. The Bridge is said to connect all places and times via the mushroom domes, the only places from which it can be entered. A person wearing a passantum can communicate with it to cause it to turn the Bridge to a specific place that is known to the passantum or to randomly flip through the existing domes in hope to find the one the visitor searches. Stepping through the fog transports the travellers through the dome to the place shown beyond the fog.
Some particulary strong-willed beings might be able to turn the Bridge themself by willing it to do so. This requires a successful Wisdom Check (DC 25) to turn the Bridge to a random location. Turning it to a known dome by sheer force of will takes a successful Wisdom check against a DC of 30. Note that the spell Enter the Bridge grants a +5 bonus to these checks.
Bridge Inhabitants
The Bridge to Eternity has no permanent inhabitants, but several travellers utilize it. There is a 5% chance of meeting another traveller on the Bridge when it is entered. These travellers are usually humanoids from various races who somehow gained access to the bridge. Fights on the Bridge are dangerous, since any fall from the Bridge is instantly deadly if the falling combattant is not able to grab one of the boards of the Bridge (Reflex Save DC 15).
Bridge Features
Outside the Bridge, constant creation and death of stars, planets, galaxies and black holes is visible. Travellers often stand in awe of this process and some are tempted by the thought of joining this process by stepping from the safe boards of the Bridge, but most can withstand this temptation. Anything that leaves the boards and drops below them is instantly disintegrated without a saving throw, and new stars and galaxies are created in the surrounding void.
While the Bridge is usually empty when it is entered, sometimes other travellers can be met, and sometimes, strange things happen. Travellers on the Bridge have reported the following events.
Vanishing Boards: From time to time, the Bridge seems to fall into a state of disrepair, and boards go missing, forcing visitors to step over the gaps and occasionally to perform dangerous jumps.
Strange Skeletons: A few tales are heard about strange skeletons lying on the Bridge with bones that are as hard as Adamantine but still broken, and filled with an unholy life similar to undead that causes body parts to attack the unwary traveller. These skeletons are of humanoid form and belong to creatures with a size of 8.3 feet.
The Black City: At rare times, the Bridge seemingly locks itself to a mushroom dome that stands before a city with huge, black towers. The inhabitants of the city, 8.3 feet high humanoids, then start an attack on the travellers of the Bridge, first throwing knifes which pass through the dome onto the Bridge. These knifes are flying, animated objects filled with a destructive force similar to the skeletons. If the travellers are lucky, the Bridge manages to turn away during the charge, and they life to tell their story. Otherwise, the humanoids enter the Bridge. No one ever heard of a person who survived such an attack.
You can see a picture of the Black City
here