Seals

Description
A seal is a magical construct that is put on portals to prevent their opening or prevent entering them. Seals appear to primarily have circular shapes and glow, and may appear to have the texture of cellophane. They also tend to have mathematical patterns or letters from different languages on them, which may move or spin. One seal also had an eye on it.

Uses
Seals are used to keep portals closed, or to prevent travel between worlds. When seals are damaged, they show signs of decay at the edges. Multiple seals may be put on a single portal, stacking along the same side or on different sides.

Known Seals
The Norikithintes Portal had a seal cast on it by the Centaurs; the seal appeared to be concentric rings with symbols from multiple languages and geometric shapes. In its center was an eye formed from the lines of the symbols which moved and watched Khi. The seal itself both caused the Norikithintes Portal to close and prevented movement across the space the portal used to occupy, manifesting as an invisible wall.

The Demon Portal had a seal cast on it by the Fae; the seal itself was solid in some manner, but did not prevent the movement of heat, as carcasses that landed on it still burned from being above lava. The seal also mainly prevented the movement of half-mortal and immortal demons, not mortal ones. This seal was covered in what seemed to be living equations that moved like snakes.