Based around scrying and casting high value instants and sorceries, Elminster's static ability reduces the mana cost of the next instant or sorcery you would cast by the number of cards you looked at the last time you scried
II Discard any number of cards, then draw that many cards
Second, the payoff is playing lands that tap for two mana, which is powerful, but at the end of the day, it's just another way of ramping into Primeval Titans, Eldrazi, and the like
Academy Manufactor might be the wildest payoff of all, transforming every Clue youd create into a Clue, a Food, and a Treasure three times the value with a single trigger
The set introduces four mechanics
This lets you hit for 12 damage for just 6 mana, and it can all go directly to your opponent