I have a warlock player who chose Patron of the Raven Queen giving him Sentinel Raven and Pact of the Chain giving him Find Familiar. Is this fair? It seems almost like he has two familiars. The spell Find Familiar explicitly states:
You can't have more than one familiar at a time. If you cast this spell while you already have a familiar, you instead cause it to adopt a new form. Choose one of the forms from the above list. Your familiar transforms into the chosen creature.
So, does the Sentinel Raven count as another familiar in this regard?