Fiendish 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.

The Familiar can see normally in magical and non-magical dim light and darkness.

Melee Weapon Attack: +Spell Attack modifier to hit, reach 5 ft., one target. Hit: 1d4 + 3 + PB slashing damage. If the target is a creature, it must succeed on a Constitution saving throw or become poisoned until the beginning of the Familiar's next turn.

The Familiar can transform into a beast form that resembles a rat (speed 20 ft., climb 20 ft.), a lizard (20 ft., swim 20 ft.) a raven (20 ft., fly 60 ft.), or back to its true form. Its statistics are the same in each form, except for the speed changes. Its equipment is not transformed. It reverts to its true form if it dies.