Ritual of dimension portal

Ritual of dimension portal was a type of ritual similar to the spell gate that was taught by the College of Rune Magics.

Effects
This ritual opened a two-way portal to another plane. It took roughly an hour to prepare and the portal it opened would remain for a couple of hours, at the very least three to four. If the ritual backfired a creature native to the desired plane would enter the caster's plane and attack him, as well as their companions.

Components
Casting this ritual required a runestick inscribed with the rune for portals, which needed to be laid on the ground at the spot the caster wanted their portal to appear, as well as the true name of the plane they wanted to open a portal to.