Synergy with flickers and discard payoffs like Tinybones, Bauble Burglar, Entropic Battlecruiser and Waste Not, then backed up by counterspells and alternate plans like control, reanimator and wheels
A 2-mana 1/1 that essentially grows every time you cast a spell does a great Tarmogoyf impression
Kinnan, Bonder Prodigy takes a different approach than the 3 previous entries, electing to instead turbocharge your mana dorks, mana rocks, and any other nonland permanent you control that makes mana by enabling them to produce an additional mana of any type they produce
On top of that, your opponent can play sorceries on your turn, which just feels unfair
National Number: 493
They are the only cards that will ever have the 1st Edition stamp (as far as we know)