Faerie Familiar

The Familiar has a total number of d4 Hit Dice equal to your Warlock level. It also gains all the normal benefits of both short and long rests.

When the Familiar is forced to make an ability check or saving throw, it adds your PB to its roll.

The Familiar has advantage on saving throws against spells and magical effects.

Melee Weapon Attack: +Spell Attack modifier to hit, reach 5 ft., one target. Hit: 1d4 + 3 + PB piercing damage. If the target is a creature, the Familiar learns its current emotional state and alignment (if any).

The Familiar magically turns invisible until it attacks, forces a creature to make a saving throw, or until its concentration ends (as if it was concentrating on a spell). Any equipment the Familiar is wearing or carrying turns invisible with it.