[20] You can pay a creature's encore cost and exile it from your graveyard to create several token copies of it for each opponent
Plus, whenever one or more Rogues you control deal damage to a player, that players mills one card for every one damage they were dealt, and if they mill a Creature card during that process, you get to draw a card
While Marketback Walker will undeniably make an appearance in Commander and has the potential to appear in literally any legal MTG format, only time will tell if it lives up to its expectations
For others, that means you'll scry and then perform other actions
We originally tried cards that fetched other specific cards, but as we found when we tried the same thing with double-faced cards (or DFCs) in the original Innistrad block, it's still too hard to have two different cards always show up together in a booster