Im not talking about a Strip Mine or Wasteland floating around to deal with the occasional Gaea's Cradle or Ancient Tomb
Port Town itself is neither a Plains nor an Island, even though it produces white and blue mana, so you can't reveal one to satisfy the ability of another
You flicker the Drake or Whale with Emiel or the Navigator, and each time you untap more Lands than you need to flicker the Drake or Whale again
In those days when the only delve threat was Tombstalker, before Deathrite Shaman, Ragavan, Nimble Pilferer, and the like highlighted peak efficiency among 1-mana threats, Mongoose was the card that let you slowly whittle down your opponents when your Delver of Secrets and Tarmogoyf were too vulnerable to removal
Today, were going over the steps of a turn, taking you from the untap phase all the way to the cleanup phase