Pass Into Shadow

Initiate/ebon roads
Level/School: 5/conjuration (teleportation)
Range: touch
Target: creature touched, or up to eight willing creatures joining hands
Duration: instantaneous
Saving Throw: Will negates
Spell Resistance: yes

You break the boundaries between worlds, opening a path into the Plane of Shadow.

This mystery functions like the spell plane shift, except that your destination or origination must be the Plane of Shadow.