One of the key Praetors or leaders of New Phyrexia is Sheoldred who is slowly spreading her influence across the plane of Dominaria Sheoldreds plan of attack involves a lot of infiltration and subtlety before she shows her full strength, and well see a lot of sleeper agents and betrayals throughout Dominaria United
February 2016 and Pro Tour Oath of the Gatewatch
By then, it just serves as a 1/1 blocker
Anyway my main deviations are tribal cards, such as Adaptive Automaton, Vanquishers Banner and Coat of Arms
This can be beneficial if all your creatures fly, but it's also helpful if opponents attack each other, letting you profit from the action
Sleeves act a bit like shield counters, where if the card would be dealt damage or destroyed, you remove a sleeve from it instead