One extra card every turn is a problem
Kess, Dissident Mage is a very consistent choice which produces a lot of bonus value over a full game, with a high ceiling if she recasts your best cards
By inserting Deaths Shadow into this shell, you had a payoff for the life you were losing from your lands, while also being able to abuse free spells like Gitaxian Probe and Mutagenic Growth to pump out your Monastery Swiftspears and help fuel delve
It's a 3/2 flier with a mana value of four, which draws you cards whenever you damage the enemy - that would be playable in draft, but the Squad ability makes it extremely powerful
Seeing one cross the auction block is a rare occurrence, and the card typically sells for tens of thousands of dollars
You need both the peanut butter and the jelly together for it to work