Blackbloom Rogue / Blackbloom Bog Blackbloom Rogue is a rogue creature that also cares about mill decks, as many rogue tribal decks do
Since Enlist is a combat-oriented ability, these cards are at their best in aggressive strategies with lots of creatures
Most counterspells are blue cards, and specifically blue instants, as its what blue does best, but there are more than a few playable off-color counterspells
This could be an associated mechanic, a type of gameplay, or a type of creature
The city's blessing isn't a permanent itself and can't be removed by any effect
Queza, Augur of Agonies often sees at least some wheels in its lists, but you could run it like a group hug commander with Howling Mine effects