School of Chronomancy

As a member of the School of Chronomancy, you seek to control the fate of the universe at its most fundamental level.  While many novice chronomancers falter before the mind-bending implications of their work, masters of the craft are decisive in their manipulations of space and time.  Of all the schools of magic, members of this school are the most likely to meddle with forces beyond their control, ultimately leading to catastrophe in the past, present, and future.

Temporal Savant

Beginning when you select this school at 2nd level, the gold and time you must spend to copy a chronomancy spell into your spellbook is halved.

Chronostutter

At 2nd level, you can send your spells a short distance into the future.  When you cast a spell, you can cause the effect to delay until an initiative count of your choice, or up to 6 seconds when out of combat.  The effect originates from the position you were 

Timeline Convergence

Beginning at 6th level, you can pull knowledge from versions of yourself in alternate realities.  Choose two spells, each from a spell list other than wizard.  You always have these spells prepared on an alternate spell list.  When you cast a spell from your alternate spell list, you can't do so again until after you finish a short rest.  You can add an additional spell to your alternate spell list at 9th, 12th, and 15th level.

Impose Continuity

Starting at 10th level, when you cast a spell with a duration of 1 minute or longer, you can double its duration, to a maximum duration of 24 hours.  If you lose concentration on that spell, you can use your reaction to maintain it.  Affected creatures may repeat their saving throws against the spell at that time.  Once you use this feature, you can't use it again until after you finish a long rest.

Causal Paradox

Beginning at 14th level, you can cast your spell backwards in time.  At any time, you can choose a spell of 5th level or lower and a casting time of one action or bonus action from your spellbook or alternate spell list.  The effects of the spell spontaneously occur, with no action required.

Once you use this feature, you enter causal debt and cannot cast spells as normal until you cast the chosen spell backwards in time.  Since its effects have already occurred, it has no effect at the time of casting.

If you use this feature while in causal debt, make an Intelligence saving throw with a DC of 10 + your chosen spell level + the total level of all other spells you are indebted for.  If you fail, the effect fails to occur, you are stunned for one round, and you can't use this feature again until you pay off your debt.