School: Chronomancy (Transmutation)
(Intended for use with the Chronomancer subclass)
Area of Effect: A surface area of 20 square feet

Upon casting this spell, the caster twists the momentum of time to create a permanent gate between reality and the demiplane of time. The gateway is totally flat (2-dimensional), but can be in any contiguous shape the caster desires, up to 20 square feet in area. Care must be exercised, since denizens of the timestreams are attracted to this portal and may be lying in wait on the demiplane of time, or possibly even attempt to come through into reality. Timegates are a liability as much as a convenience.

The material component for this spell is a diamond worth 5,000 gp that has been on the demiplane of time for at least one subjective day.

The caster must make a Wisdom save once the spell has been cast. Failure means the gateway collapses. Whatever the result, the diamond is consumed and lost in the process.

Based on 2e AD&D spell Slipgate, from the Chronomancer suppliment (TSR 9506).