IT HAS BEEN SAID that Magic is a battle, largely, between iconic two-drop creatures. The linear centerpieces, Wild Mongrel and Arcbound Ravager, were champions of their respective Block Constructed formats; the most popular two-drops in their respective Standards; and longtime competitors—including against one another—in big formats as far afield as Extended, Modern, and Legacy.
The Invitational Wizards, Meddling Mage and Dark Confidant, have both torn up combo decks and enabled combo decks. They have blocked key cards, drawn extra cards; stood alongside Isochron Scepters and Dark Depths; fiddled with Sensei's Divining Tops and laughed gleefully at blind Counterbalances. Oh, and Snapcaster Mage, of course, has more recently joined their jeesh.
THE ICONIC TWO-DROPS TELL A STORY. Or, rather, many stories—a story (and more) each. They are the first pages (second pages, really) of the stories we have become so accustomed to. Wild Mongrel is followed by Arrogant Wurm (often during combat) or Wonder gives players an all-new way to be mana screwed. Arcbound Ravager's supporting cast of Skullclamp and Disciple of the Vault were like a parade of banned beaters.
Stoneforge Mystic made for an apt swords(wo)man and looked really good thanks to Sword of Feast and Famine in Standard; Umezawa's Jitte made an ideal partner in Legacy, but it was Batterskull—allowing Stoneforge Mystic, essentially, to drop a Baneslayer Angel mid-combat—that proved Stoneforge Mystic's too-good mettle against the rest of the field.
IT IS KNOWN that the white two is about the most competitive slot in the history of fantastic creatures. Garfield did it right the first time around with White Knight. White Knight—first released in Alpha—has been a persistent performer, almost whenever it has been legal to play. White Knight analogues like Silver Knight in Onslaught Block and Hand of Honor in Kamigawa Block took down a great many tournaments each. But White Knight itself proved good enough to help Craig Wescoe score a PT Top 8 as recently as 2010... when his opponents were setting records with Bloodbraid Elf and Jace, the Mind Sculptor was making its big debut. Although not the centerpiece of any deck, White Knight was always the picture of efficiency. A 2-power creature for only two mana loaded with abilities, both anti-spell (protection from black) and anti-creature (first strike). White Knight was a "hate bear" when Necropotence was big; a removal dodger in a variety of formats; and a perfect point on the curve nearly every time, across the many generations.