New Spell: Premonition (D&D 5e)

1st-level Divination (Bard, Cleric, Sorcerer, Warlock, Wizard)
Casting time: 1 action
Range: Self
Components: V, S, M (an amethyst)
Duration: Concentration, up to 1 minute

You experience a brief but intense vision of an event that is about to happen, using that knowledge you can shape the next few moments.
While this spell is active you may force any one action to be rerolled. All bonuses, penalties, and other effects are repeated exactly as before. If an event or action requires more than one roll only one roll is rerolled per intervention from this spell. If you force a reroll with this ability you must accept the results of the new roll and this spell expires.
You may benefit from no more than one casting of this spell at a time.
At Higher Level. If you use a spell slot of second level or higher, you increase the duration and amount of change you can impose during that time. For each level above first you add one minute to the duration of the spell and can force one additional action to be rerolled before the spell expires. Even at higher levels, you may force no action to be rerolled more than once through the use of this spell.

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New Spell: Sharpen Mind (D&D 5e)

Level 1 Divination (Bard, Sorcerer, Warlock, Wizard)
Casting Time: 1 reaction
Range: Self
Components: V, S
Duration: Instantaneous
Various casters describe this spell in different ways. You might experience a sudden strong memory of where you saw some desired information previously, find your memory palace snap into supernatural focus, or suddenly feel connected to a deep well of memory beyond your understanding. There may actually be several versions of this basic invocation.
When you fail a Intelligence skill check you may immediately cast this spell as a reaction and reroll the check. All bonuses and penalties which applied to the first roll still apply, but not advantage or disadvantage.
At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, after this spell effect is complete, you regain a first level spell slot if you have expended any.

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