The company emphasized the significance of "ensuring more fans can access the latest expansion" when explaining its decision
Clearly the crown is up for grabs
Anointed Procession, Mondrak, Glory Dominus, Doubling Season, and Parallel Lives are all excellent examples of cards that double token generation, but they are all quite monetarily expensive
with a trigger effect that KOs an opposing character with power equal to or less than the opponent's remaining life points
Their typical gameplan is to whittle the opponent's LP through a prolonged game, attacking directly through the effects of "Ghostrick Mansion" or "Ghostrick Museum", while protecting their face-down monsters and locking down the opponent
While doing this research, you may find that cards graded by different grading companies command a different price (CGC vs PSA vs BGS for example) and that should factor into your decision about where to grade