Rhystic Study triggers off of every spell being cast, so the more you try to do, the more cards the controller of Rhystic Study draws
That can get you all 3 cards, but it comes with a much harder restriction, as it really wants you to be in a Lesson archetype
While it comes with sufficient amounts of card draw, some of those are on weird corner case cards like Master of Ceremonies and Selvala, Explorer Returned which also provide cards for your opponents
The finisher is that a lot of these cards become even more powerful thanks to Light of Promise, an aura card that costs three-mana that puts +1/+1 counters on the creature it is attached to for every point of life gained
Gather your group and defend Baldur's Gate against the threats looming over the city
Over the years they have introduced tens of mechanics to the game, in order to keep things interesting