An opening spell is any spell that facilitates the passage between two zones, opening the way to make a pre-exisiting connection accessible.
“Portaberto is a spell used to splinter a lock from a door; prior to the discovery of the...Portaberto
“Annihilare is the incantation of a door-opening spell. The topmost cell of the Dark Tower was...Annihilare
“Open Sesame was the incantation to a spell used to rip doors from their hinges and tear them to...Open Sesame