An opponent got out an early Dockside Extortionist, Smothering Tithe, or perhaps reanimated a Razaketh
This specific card isn't available in any other language, which makes it rare and unique
City of Ass A clear riff on City of Brass, City of Ass is actually a very solid 5-color land: if you have two copies in play or have a way to copy its ability, you can generate 3 mana of any color per turn
and many named counters (such as soul counters) won't have an effect unless the recipient permanent refers to them in some way
There are myriad ways to sell your Magic cards, many of which are trusty, household names in the MTG community
Since typical Limited decks need their first 3 land drops, would like to hit their 4th land drop, but dont necessarily need 5 lands by turn 5, the age-old standard of 17 lands indeed seems like a good number