Even when all you got out of this was the discard the overpayment wasn't that dramatic, and many decks were forced to adjust their builds to minimize the damage
The latter one makes a 1/1 flying Spirit to block or swing, but if you are the Monarch that'll be a 4/4 Angel instead
For the most part, the Worlds Smallest Magic the Gathering Duel Decks are just cool, collectable items
Shichifukujin Dragon The Card That Never Left Its Cage Year Made: 1996 Magic It Does: A 7/7 flying dragon that can be boosted by +1/+1 counters each turn for 2 mana
Scion currently sits at roughly $7, and it will absolutely make its presence felt
Mishras Factory, unlike Strip Mine, wasnt a staple for one particular type of deck, it was just inserted into almost every type of deck, depending on the builder/player