Portals are magical gateways through the very fabric of reality itself that allow an adventurer to travel instantly between any two locations. Typically portals can only be created between two locations on the same plane of existence, although there are rumors of some portals which lead to fantastic places beyond the understanding of mortal ken. Portals may be created through some class skills such as Groves, Crystalism, or by certain powerful artefacts such as the Wand of Portals. Most of these magical portals can be blocked or slowed by the use of a Sigils.
There also exists the Ring of Portals on Loom Island which are used by newbies to reach various locations throughout the lands.
This should talk about grove portals, planar portals, Wands of Portals, etc.