Ward

When you see a friendly target take damage you may use your reaction to raise a Ward of force to protect them.

 At Level 1 the Ward blocks damage up to 1d4+ spell casting ability modifier. 

If the Ward exceeds the incoming damage then no damage is taken, it does not become a heal, and it does not block any secondary effects such as knockdown, but can carry over to reduce secondary damage types, such as in the case of a giant spiders bite additional poison damage.

At level 5 Ward will block 2d4 + Spell Casting Ability.

At level 11 Ward will block 3d4 + Spell Casting Ability.

At Level 17 Ward will block 4d4 + Spell Casting Ability.