Where Can I Buy the Power Nine
It requires specific kinds of board state: your opponent must have a board youre able to bounce, you need a creature big enough to bounce all of their important creatures, and you need to have sufficient resources to take advantage of trading card advantage for tempo (which runs counter to how almost every other Exploit card works)
Rubys Rare and Super-Rare cards all reward for you winning challenges, including Aladdin: Heroic Outlaw, Raya: Leader of Heart, and Shere Khan: Menacing Predator
These cards also appear in non-foil in Collector Boosters
You wont make many friends if you cast an Armageddon, since not only are you denying players resources, something no one likes, but youll likely be dragging the game out for a long, long time while players try to rebuild their board.