Bolster Familiar

Your spell empowers one familiar in range with toughness and cunning. For the duration, the familiar’s hit point maximum and current hit points increase by 3d6 and its AC increases by 2.

At Higher Levels. When you cast this spell using a spell slot of 2nd-level level or higher, the target’s hit points increase by an additional 2d8 for each slot level above 2nd-level.