They have some abilities that Ready their characters, so Mulan Charging Ahead will be very useful Unfortunately, they also have a couple of very effective strategies against your Challenger-focused deck
It gains "When this creature dies, draw a card and create a tapped 4/3 white and black Vampire Demon creature token with flying." Legendary Creature - Vampire Cleric Commander (CTRL to add secondary) Artifact Glass-Cast Heart Whenever one or more Vampires you control attack, create a Blood token
The Illumineers Trove not only is a secure and stylish storage solution but also offers the opportunity to customize and expand every collection
Voltaic Key Ramp, fixing, artifact support on the cheap and even part of some combos
From aggressive token strategies, to heavy control shells
This seems to provide some quick delineation of which cards are affected and which aren't that's relatively simple to implement in a game with lots of numbers