7 Crown Zenith Ditto (Numel) This card has one Ditto disguised as the third-generation Fire-type Pokemon Numel, blending into a herd of them
Equip only as a sorcery.) Artifact - Equipment Rabble Rousing Hideaway 5 (When this enchantment enters, look at the top five cards of your library, exile one face down, then put the rest on the bottom in a random order.) Whenever you attack with one or more creatures, create that many 1/1 green and white Citizen creature tokens
The reason its not in the Top 10: its a contest promo, not a booster or high-class pack card
Elven Chorus I prefer Elven Chorus to most other forms of green card advantage, like Guardian Project or Beast Whisperer
Furthermore, there are many more widely played formats (such as Tiny Leaders) I could provide a link to, but the reality is that if you include all those formats in your definition of previously banned, some person will eventually just invent a format that bans every card but basic lands, and therefore will be able to tutor all cards
Then as others arrive you can make one trigger too