The most important development in the last 20 years has been the introduction of the EX cards, one card that is a particularity strong, but carried the risk of losing two prize cards if defeated
Sleepys Flute costs just two ink, so you can have it on the table within just a couple of turns
Since a deck is limited to only four copies of a non land card usually, this added diversity comes at the cost of significantly reducing the chances of getting a certain card in a given game
Knowing when to draw is as crucial as knowing what to draw
The ability to boost artifacts and Heroes based on Artificers present and in the graveyard is a great nod to the Cids throughout the series supporting the protagonists with their technical expertise
If the rules allowed both sides of the card to give you access to the cards the other had exiled, I might be more excited about these two being on the field together but as I understand it they don't work that way