I originally had this idea for Rapier: Divine Soul, regarding a method to fix the flow of the cards and prime the game pace (for a more exciting experience). This is apart of a long-standing concept I've been pondering in secret, over various methods that could be implemented to fix the flow of the cards in MTG. This concept involves appropriating a keyword for each set that specifically focuses on fixing the flow of the cards. This particular method involves utilizing the effect of Teferi's Puzzle Box, taking the form of a keyword ability for spells (and maybe permanents) to naturally prime the flow of the cards in the set. I would like to think that this functionality will become a staple in the toolbox for the development team. Also having the diversity to take many different forms, from otheralike effects, which can now be implemented in this way towards a greater, broader benefactor for the game as a whole.
Unnamed Keyword(As you cast this spell or when this spell resolves or is countered, you may put the cards in your hand on the bottom of your library in any order, then draws that many cards.)
Okay so, in regards to how this would be done. This concept is not something that is going to be able to take wing off a single keyword each set, but is going to need a primary keyword in each Core Set over the blocks to combine with the one in each block. Understanding from this stems from my experience in the Pokemon Trading Card Game, in which the deck engine is comprised of draw strategies which combine the effects of the three primary types of draw interaction.
Straight Draw: Cards drawn from the top of the deck, or selected from a number of cards off the top of the deck.
Wheel Draw: Shuffling the hands into the deck and drawing new cards from it.
Direct Retrieval: Direct access to a specific card or type of card, or selected from a number of cards off the top or bottom of the deck.
Each have their own quirks, and the combinations of these effects stack for better or worse with one another, depending on your resource demands, and your resource deployment capabilities. There is a bit of a difference between the two game engines, but in MTG these dynamics should not be much different in a vacuum. There should actually be even more capability to combine what would otherwise be lesser, inferior, improficient (or even consequential) draw combinations to great success in the MTG game engine. This opens up freedom in development, and diversity which helps to keep things new, exciting, and fun. Furthermore, these keywords will not impede on previous designswith alike affects. Their effects will only stack with these keywords and hyper-accelerate the game pace even further, making the game even more fun and interactive. So there will still be great incentive to design such cards and play them.
Such effects to be considered are: Merchant Scroll, Scroll of Origins, Scroll Rack—and variants of Twinning Glass, Dragon Arch, Belbe's Portal, Divining Witch, etc.
Unnamed Keyword (As you cast this spell or when this spell resolves or is countered, you may put the cards in your hand on the bottom of your library in any order, then draws that many cards.)
Each have their own quirks, and the combinations of these effects stack for better or worse with one another, depending on your resource demands, and your resource deployment capabilities. There is a bit of a difference between the two game engines, but in MTG these dynamics should not be much different in a vacuum. There should actually be even more capability to combine what would otherwise be lesser, inferior, improficient (or even consequential) draw combinations to great success in the MTG game engine. This opens up freedom in development, and diversity which helps to keep things new, exciting, and fun. Furthermore, these keywords will not impede on previous designs with alike affects. Their effects will only stack with these keywords and hyper-accelerate the game pace even further, making the game even more fun and interactive. So there will still be great incentive to design such cards and play them.