A balanced setup usually includes: Targeted removal to stop early engines and problem permanents A few board wipes to reset faster decks and punish overextension From there, close with a clear win path overwhelming flying combat, damage multipliers, or lifegain-based pressure that opponents struggle to race
When determining which effects stop working and which are not, you need to read the card text very carefully (preferably in the Oracle!) Banisher Priest phases out, then the exiled card will not return, because Banisher Priest does not leave the battlefield, and the effect does not end
"The idea came early on to include a cycle of enemy color [Elder] Dragons as the founders of the five colleges
(That estimate comes from $400/box breaking down to $33.33 per pack.) Depending on the popularity of those cards, the price could move a lot
Dogged Detective With the right discard outlets or sacrifice outlets, a single Dogged Detective ends up being something like four or five Dogged Detectives throughout the course of the game