Upon casting this spell, the chronomancer twists the momentum of time to create a permanent gate between reality and the Demiplane of Time. The slipgate is totally flat, but it can be in any contiguous shape the caster desires, up to 20 square feet in area. The caster must make a save vs. spell once the spell has been cast; failure indicates that the slipgate collapses.
If successful, care must be exercised, since denizens of the timestream are attracted to such portals and may be lying in wait on the Demiplane of Time or might possibly come through into reality. Slipgates are a liability as much as a convenience. A successful dispel magic can collapse the portal.
The material component for this spell is a diamond worth 5,000 gp that has been on Demiplane of Time for over one subjective day. The diamond is destroyed in the process.
Notes: Restricted to chronomancers; common.