If you want to go bigger, you can lean on Aether Refinery and Stone Idol Generator
(Each deals damage equal to its power to the other.) If an effect instructs you to "double" a creature's power, that creature gets +X/+0, where X is its power as that effect begins to apply
Either way, it amasses an army (without amassing an army, of course), then pumps them all to high heaven
When I say cards that win the game I mean cards that have very good odds on winning the game, the few that exist which actually say win the game are pretty unplayable and not worth it
There are many collectors among the Japanese, which makes it quite easy to find cards or decks, either by buying them from specialized stores or by buying them directly from Japanese collectors
I fully expect the lairs to sell out within a day or two, and when people get their copies and crack them, Ill want to target the Sol Ring, Open the Armory, and Hammer of Nazahn