Arcane Ward

Passive Feature - BG3

The residual magic of your spells forms a ward around you that protects you from harm. Each time you cast an Abjuration spell, the intensity of the ward increases by the amount of the spell's Level, up to a maximum of 2x your Wizard level. Each time you take damage, the ward blocks an amount of damage equal to its intensity, and its intensity decreases by 1. After each Long Rest, the ward's intensity resets, and becomes the same as your Wizard level.