Elven Chorus I prefer Elven Chorus to most other forms of green card advantage, like Guardian Project or Beast Whisperer
The Mana Base The term mana base refers to a deck's lands and any supplemental ways to produce mana, such as anything along the lines of Elvish Mystic or Verdant Haven
Then as others arrive you can make one trigger too
In practice, blue decks tend to be very good at blocking creature removal, and the generous wording on the aura means you dont need to risk the enchanted creature in combat to get the benefits
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