Druid Circle: Circle of the City [ROUGH DRAFT]

Completed classes I have yet to generate a subclass for:

Barbarian, Druid, Ranger, Sorcerer, Wizard

One down, four to go!

A really interesting thing about subclasses in 5e is the very different conceptual space each of them take up. A rogue, for example, mostly gets abilities in their subclasses that work to further the fluff of being a rogue, as the majority of their crunch and damage progression comes from the class itself.

Dramatically less so with the druid. Most of what makes up a Druid Circle is entirely crunch, with fluff taking a back seat. Indeed, most of a druid's progression beyond base spellcasting and cantrips comes from their choice of circle, be that damage progression from the Land's spell slots, Moon's forms, or Twilight's damage scaling, or healing progression as with the Dream's definitely-not-lay-on-hands.

One of the trickier parts of formulating a druid is inserting fluff alongside necessary crunch. A Druid Circle may have fluff, but it also absolutely has to have a Thing It Does that no other Druid Circle does. So much of the design space in terms of crunch is already well-occupied, leading one to have to be pretty creative when making an entirely new type of druid.

FEATURES:

• Have a street-based familiar, including pigeons and raccoons! No one should have to face the mean streets of a city by their lonesome. 
• Use your familiar to fortify your allies, but good luck convincing the party cleric to let a raccoon climb all over her. 
• City-based spellcasting, giving you an assortment of city spells, similar to what a land druid receives.
• Push through crowds effortlessly, and take the faces of those you have seen. Not in a literal sense, more in an expend-two-uses-of-wild-shape sense.
• Be one with the city itself, and learn to commune with it as you would nature. 

CONCERNS:

• Some of this is intentionally derivative of the Land druid, as I intended this as a sort of counterpoint to its wild-based magic. Don't want it to be too much of a knock-off, though.
• The pigeon's Natural Messenger ability may be a little powerful, but eyeballing it I don't find it to be much worse than a raven's mimicry. 

WHAT I LEARNED:

• A whole lot, actually. Designing druids is very difficult for similar reasons as wizards, because what has already been done with the class crunch-wise (including UA) is already very comprehensive, but there's still a little wiggle-room left that can be elaborated upon.