The goddess of magic and mysteries herself has granted you access to this long forgotten knowledge.  Magic is magic.   Though many have divided the arcane and the divine into two separate categories, the truth is that it all comes from the same source.... Mystra.  She has granted you the ability to control ALL magic to a degree. 

Understanding of the Weave

You become proficient in the following skills: Arcana, Religion.

Your proficiency bonus is doubled for any ability check you make that uses either of those skills.

Channel Divinity: Knowledge of the Weave

Starting at 2nd level, you can use your Channel Divinity to tap into a divine well of knowledge. You can use your channel divinity to cast any spell that you had prepared but have already cast.  This spell can not have a casting time longer than 1 action.  You must still pay any spell component costs again.

Channel Divinity: Unweave

At 6th level, you can use your Channel Divinity to interrupt the casting of a spell nearby.

As an reaction, you can use Channel Divinity to cast the Counterspell Spell at your highest spell level.

Potent Spellcasting

Starting at 8th level, you add your Wisdom modifier to the damage you deal with any Cleric cantrip.

Universal Truths

Starting at 14th level, your vast understanding of magic as a whole has granted you the ability to resist some of its harmful effects. You have advantage on saving throws against spells. Furthermore, you have resistance against the damage of spells.