Character Concept - The Familiar

I think it would be neat to have a more purebreed werewolf type other then warwick that can shift between human and wolf. While Nidalee already does this, it could be semi supportish and be able to oath to someone at the beginning of the game kind of like Kalista so that it has a special benefit between the two characters. Perhaps like Nidalee the ult is the shifting capability, but its passive affords additional healing or damage when close to the person they oathed. Given that it would be a wolf there should still be damage output, but it have a kind of spirit helper aspect. Like it might have a slowing bite with bleed, or that if it is in spirit form it can choose to give some of it's lifeforce to people but extra to it's oathed at a higher percentage for free.

The idea of a character that is closely linked to another in a more mythological helping forest spirit aspect appeals to me especially if it has shapeshifting.