It's easy to learn and play, making it an excellent choice for both new and experienced players
Assuming your library doesn't get shuffled after it dies, it'll constantly recur itself from the graveyard and give you the opportunity to cast it at a less expensive level for its miracle cost
Custom backs keep things clear at the table, avoid confusion, and still play perfectly in sleeves
The five colors are white, blue, black, red, and green, and as such, Sunbird Effigy's characteristic-defining ability can't set its power and toughness higher than 5/5
The first wave of amass cards all created a Zombie Army, but with the addition of amass orcs in LTR, the original mechanic was changed to amass zombies. This allows different sets to represent armies that match the flavor of that set