You are going to tap your Sergeant for a two-mana fetcher, and then tap that fetcher, for a three-mana fetcher, and so forth, until you win with 5-6 Rebels out
Cards are activated one at a time from the top down, working towards the active players original card at the bottom - this represents other players responding to the active players action
Websites and apps like TCGplayer, PriceCharting, and Collectr aggregate sales data from multiple marketplaces, giving you a solid baseline
It could be something simple like Quandrix Pledgemage getting a +1+1 counter
Also, if you missed any of our past coverage of this count-up, feel free to read these articles below to refresh yourself
The spirit is another card slotting into Commander decks with a chance to perform in other MTG formats