Thalia, Guardian of Thraben Thalia, Guardian of Thraben is the ultimate Death & Taxes commander, and it makes life difficult for opponents by taxing their noncreature spells
Think along the lines of Niko, Light of Hope, Adrix and Nev, Twincasters, and such
If Starry-Eyed Skyrider leaves the battlefield, any attacking tokens will no longer be granted flying by the last ability
A couple of the gifts include giving them a 1/1 fish token or letting them draw a card
But I'm going to pick Emrakul since the Flying Spaghetti Monster is the only one that is still regularly winning games today, although, at the time, Jace, the Mind Sculptor would have been an easy pick
Krang even accelerates win conditions like Psychosis CrawlerPsychosis Crawler