As for what cards you want to collect to upgrade, Id recommend picking up 5,000 Years in the Future packs
Guadragon Agarpain is one of the strongest cards ever printed because it can special summon a Dragon-type monster from the extra deck without negating its effects
Known in older formats as one of the best creatures to tutor for with Tinker, it's a beefy islandwalker that's here to end the game
If we wanted to stay with the Human subtheme, we do get Mayor of Avabruck and Hamlet Captain to add to the above mono-white list: Creatures (34) 4 Soul Warden 2 Auriok Champion 3 Noble Hierarch 3 Soul's Attendant 4 Serra Ascendant 4 Champion of the Parish 2 Hamlet Captain 4 Mayor of Avabruck 2 Serene Steward 4 Thalia's Lieutenant 2 Renegade Rallier Lands (22) Spells (4) Pretty straightforward gameplan here, once again taking advantage of the fact that we have access to Collected Company
This will definitely happen in the self-correcting Draft format: if too many players fail to recognise the power of the best processor cards, shrewd players will pick them up, easily find enough support to exile their opponents cards, and ride the combination to victory
