Overduranium

Overduranium is a completely indestructible matter in all universes that don't contain unstoppable forces. It can only be created by divine beings, most notably The Alphabet Bird, and John Johnson while inside WWSNG.

Uses
Overduranium is a material that is both immeasurably valuable and exists in technically infinite amounts, but is extremely difficult to obtain. Along with other things, it can be used for:
 * Ultra secure prisons
 * Ultra secure safety deposits
 * Capturing deities
 * Unbreakable machinery parts
 * Construction near black holes
 * Magical weaponry

Acquiring
Overduranium can only be created by powerful deities, mostly gods and a select few demigods with matter-creation capabilities. And of those entities, only The Alphabet Bird and John Johnson are capable of creating overduranium in specific shapes.

Most pieces of overduranium are very small and randomly shaped. However, sometimes even low-level matter-creators are able to make somewhat useful items. 99,6% of all generated overduranium is sent to the Interdimensional Overduranium Trade Center.

Overduranium trade
The Interdimensional Overduranium Trade Center, or IOTC, is a trading post that connects quadrillions of different universes of Pigverse.

The idea behind the IOTC is, that in the vast multitude of different multiverses, there must be at least one that requires a certain shape of overduranium. Trade is usually by weight only, in order to keep the amount of overduranium in each universe static. However, a two-party agreement can break this rule to any extent.

Trading itself is free, the only thing one needs is a piece of overduranium. However, the IOTC is hosted by a massive quantum computer, and server costs are gathered from donations.

IO-UF divison
IO-UF division refers to the existence of either an unstoppable force or an immovable object in a certain universe. All universes where overduranium appears naturally are IO-universes. If overduranium is brought into an universe with an unstoppable force, it can technically be reformed. This is immensely difficult, however, and there exist no recorded cases of it happening in the current universe.

Notable items made out of overduranium

 * Certain immortal beings, such as Indiana Stark are made out of living overduranium.
 * The spines of Chupacabras.
 * Johnson's secret vault in WWSNG.
 * Tris of Arawen's sword.