Read on and find out how we define that term and what cards fit the bill
For this, he usually buys displays, which are the cardboard boxes containing multiple boosters
See, Dream Eater is the blue MYTHIC in GRV, and Cloudreader Sphinx is a COMMON
As you dont always need to outright banish characters to use a lot of your effects, damaging is simply enough, and that extra card can be a game changer
You could also go the infect route with a pretty good range of flying infect creatures in white and black, from Tine Shrike and Shriek Raptor to the black flying infect creatures I suggested for Brokkos
It works with everything from cards that were in Standard at the time of printing (Living Death, Recurring Nightmare) to strategies recently printed (Boneyard Wurm, Spider Spawning) and everything in between