Portal

Taking the time needed, you can channel a large amount of energy that opens a portal to a destination within the indicated distance of your choosing. To make the portal bigger, channel more essence into the spell, up to 25 square feet. For every square foot, you increase the size of the portal, which the cost of the spell increases by one essence. For every ten essence spent, the number of actions required to channel the spell increases by one action.

The location must be a place that you have been to. Walking through the portal is equal to walking through a doorway that leads into another room. You cannot teleport to unknown locations, as you do not know what you are looking for when determining the destination.