At the beginning of each end step, create X 1/1 black Rat creature tokens with "This creature gets +1/+1 for each other Rat you control," where X is the number of creatures your opponents controlled that were exiled this turn
He has vigilance
Aside from the Dragonite and Gengar singles, the three legendary bird cards - Articuno (#2), Moltres (#12), and Zapdos (#15) - are also very desirable
Reanimator decks are a good way to keep pace in a faster game since you can cheat out big threats early
and Sami, Ship's Engineer, which rewards you for tapping creatures by building your Robot army one end step at a time
Vona, Butcher of Magan At this point, Im honestly including Vona, Butcher of Magan as a form of respect to it for being a viable knights commander when there werent that many