For me, Belle is actually one of my favorite cards from The First Chapter from a playability standpoint at well, with two fantastic abilities
Green doesnt hurt for mana production, meaning you could reasonably activate this effect earlier than turn six
If you have cards that benefit from banishing items on the field, well, now youre in business
The power that comes from devoting yourself entirely to ambition is huge amounts of mana through swamps matter cards such as Crypt Ghast and Cabal Coffers, as well as having no issue casting cards such as Grave Pact and Necropotence
Unlike other sources of ramp, like creatures or artifacts that tap for mana, lands are very difficult to remove from the battlefield, and unlike temporary ramp, like Dark Ritual, extra lands continue to provide an advantage turn after turn
If it has neither, create a Food token