Affinity fills the board with cheap artifact creatures like Pinnacle Emissary tokens and Kappa Cannoneer, so Pick Your Poison's -2/-2 mode is a great sweeper against their small Drone tokens and can even help against Kappa Cannoneer early. Lightning Axe cleanly kills Pinnacle Emissary and is easy to pay for given our card-heavy hands. Golgari Thug's small body trades poorly and doesn't advance our plan fast enough against their explosive curve, so it's cut, and Artist's Talent's slow value engine doesn't help us race a deck that can kill by turn 4. Although Vexing Bauble can counter free spells here since Affinity's card advantage (Mishra's Bauble) costs no mana to cast, it stays in the sideboard.