The default commander, The Swarmlord, complements this idea by not only getting 2 +1/+1 counters for each time its cast from the command zone, but also draws a card any time a creature you control with a counter on it dies
I snagged The Abyss in pack two, which notably does not affect artifact creatures, and in the third pack I actually took Tinker over Mox Emerald because Tinker was more likely to lead to a broken start in my deck at that point, and had significantly more value later in the game
Poliwrath features one of the widest ranges among its most valuable cards, starting with cards under $20 and eventually working their way up into the hundreds of dollars for the best Poliwrath card you can buy
Durable Body can, on a coin flip, prevent KO and save it with 10 HP instead
While the Extra Deck was only comprised of Fusion and Synchro Monsters at the time of the card's original Western release (it was released in 2001 in Japan, when only Fusion Monsters existed in what was then the Fusion Deck), in modern play the card could bring out a whole host of Xyz, Pendulum and Link Monsters with ease -- were it not for the card's errata