Undead Familiar

You weave necromantic energy through the corpse of a tiny beast to gain its service as your familiar.

You may only animate the following beast corpse:bat, cat, crab, frog (toad), hawk, lizard, octopus, owl, poisonous snake, fish (quipper), rat, raven, sea horse, spider, or weasel.

The undead familiar you create appears in an unoccupied space within range, has the statistics of the corpse you've animated, and is considered undead instead of a beast. The familiar acts independently of you but always obeys your commands. The familiar can not gain any temporary hit points and is affected by spells that turn undead. In combat, it rolls its own initiative and acts on its own turn. The familiar can't attack, but it can take other actions as normal.

While your familiar is within 100 feet of you, you can communicate with it telepathically. Additionally, as an action, you can see through your familiar's eyes and hear what it hears until the start of your next turn, gaining the benefits of any special senses that the familiar has. During this time, you are deaf and blind with regard to your own senses.

When the familiar drops to 0 hit points, the corpse rots and disappears, leaving behind no physical remains. You must find another corpse in order to cast this spell again if your familiar is destroyed.

You can only have one familiar cast by this spell active at any time.

Finally, when you cast a spell with a range of touch, your familiar can deliver the spell as if it had cast the spell. Your familiar must be within 100 feet of you, and it must use its reaction to deliver the spell when you cast it. If the spell requires an attack roll, you use your attack modifier for the roll.