The short version is that Stensia Masquerade is a very snowball-y card that works particularly well on fliers
Sower of Discord is a fun one, especially if you have more than two opponents to pick from giving you a chance for some fun politicking
Library manipulation can help establish advantage a game of inevitability, and in that game of inevitability, library manipulation can stitch the game closed
Granted, Assault on Osgiliath requires you to be playing Goblins, but its not like thats strange to build around these days, so I consider this one of those silver-bullet theme cards
Instead, the flesh of its dead gives rise to alga
The original Khans of Tarkir (due to a lot of work by Erik Lauer) is considered the first time R&D really handled three-color design well