Jogloran's Portal of Cheaper Travel

What's it called? Jogloran's Portal of Cheaper Travel (in short, JPCT).

What does it do? This is everybody's favourite and probably most used spell (even by a high number of non wizards, thanks to scrolls). Jogloran's is the most efficient means of fast travel in the Disc. A succesful cast will open a dimensional portal to some other place in the Discworld, in the shape of a peculiar door. The only inconveniences of the spell are that 1) for casting you need to have the location you want to go to previously stored ('blorpled') in an item, be it a stone or jewellery; and 2) it requires quite high-end skills for opening a portal to the place you actually want to go (good to look through the door before crossing just in case, as you may land in many dangerous places, like the Shades or in the middle of the sky...). Even with said skills, misportals are quite regular currency, as are rumbling/burning doors which will burn you or explode in your face, specially if you are trigger-happy.

Where is it? In ages past, when it was easier to cast too, it lurked in the Begginer's Tomes. Now you have to enter the library to substract it from the Introeductyon too thee Strukture of thee Multyverss grimoire, at the Unseen University.

What does it require? A blorple, as stated. As is well known, there's two spells for creating them, which you have to cast (depending on the spell/item) on the room you want to store. Then, for portalling there, just cast Jogloran's on the said blorple.

What skills do I need? Enchanting, Evoking, Binding, Dancing, Banishing

Has it worked? A correct output should be something like this:

You prepare to cast Jogloran's Portal of Cheaper Travel.
You start to sketch a door in the air with your finger / the xxx (only if holding a staff).
The lines you sketched in the air start to glow a red colour.
A strange green smell escapes from the forming door and slowly wisps its way around the room.
You can see the door starting to materialise, and try to ignore the small figures looking eagerly at the opening.
You start dancing wildly around the floor throwing power and moonbeams at it in the hope of scaring off the creatures.
A xxx door solidifies with a satisfying thump.

Help Information:

Jogloran's Portal of Cheaper Travel - create a portal to a far land.

Jogloran's Portal of Cheaper Travel is a miscellaneous type spell that uses Rictor's unreality factor to create a portal between two places on approximately the same level of reality. It can be cast at either a blorpled rock or a clever piece of jewellery. If you do not want to be followed, you can "push" or "shove" the portal, which will make it fall over.