Anticipate Arcana 2014

3rd-level divination

Casting time: 1 reaction, which you take when an enemy you can see casts a spell
Range: Self
Components: V, S
Duration: instantaneous
Classes: Cleric, Sorcerer, Warlock, Wizard

Your foresight gives you an instant to ready your defenses against a magical attack. When you cast anticipate arcana, you have advantage on saving throws against spells and other magical effects until the start of your next turn.

Source: Deep Magic for 5th Edition (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details