Source: Arcana Unleashed
Origin Feat
You gain the following benefits.
Faithful Companion. You always have the Find Familiar spell prepared. Intelligence, Wisdom, or Charisma is your spellcasting ability for this spell (choose when you select this feat). You can cast it once without a spell slot or Material components, and you regain the ability to cast it in this way when you finish a Long Rest. You can also cast the spell using any spell slots you have.
Fortified Familiar. When you cast the Find Familiar spell, your familiar’s Hit Point maximum and current Hit Points are increased by an amount equal to twice your character level.
Helpful Friend. When you make an ability check using a skill in which you have proficiency while your familiar is within 5 feet of you, you gain Advantage on the check. You can use this benefit a number of times equal to your Proficiency Bonus, and you regain all expended uses when you finish a Long Rest.