Raw power level and rate is seen in the efficient cards that dominate tournaments (Bonecrusher Giant, Uro, Titan of Nature's Wrath, Lurrus of the Dream-Den), while the more amusing cards are weaker but can get a chuckle and be fun casual build arounds (Clackbridge Troll, Colossification, Sisay, Weatherlight Captain)
Goblin Electromancer has long been a staple of Izzet spells-matter decks, as its cost reduction ability for instants and sorceries is crucial for decks looking to get ample value out of casting their spells
Since you can activate Aetherflux Reservoirs ability at instant speed, players are hesitant to try and remove it or threaten you in any significant way once you have enough life to take one of them out with it
Here you see that the deck list includes the number of cards (1-4 except for basic lands), the card name, and then the 3-letter set code followed by the collector's number
As is the case with almost all the rules here, there are exceptions