When you cast this spell, you create a link between now and an older version of yourself through time and space for the purpose of channelling a spell that can be used later. The spell you channel must be of a lower spell level than the Temporal Link's level or the link collapses. After casting the Temporal Link you must cast the spell you wish to channel, the casting time is normal but if the spell requires concentration you must concentrate on that spell for the length of time you wish the spell to be active. Once you have finished casting the channelled spell the link automatically closes. You can only have one spell stored in the Temporal Link at a time because the next time you cast it the channelled spell is released. At a future moment you may cast the Temporal Link spell again as an action. Immediately, as if you had cast it yourself, the channelled spell will activate. If the spell requires concentration you do not need to concentrate on it because you already have (in the past).