Previous four-player sets, such as Conspiracy and Commander Legends , have incentivized faster games using the monarch mechanic, which lets players draw a card while they're "the Monarch," with the crown passing around whenever a player deals combat damage
The pros are that these are easy to attain, and happen in the background The cons are that WotC picked which cards you earn and you have a limited time to do so
The majority are top-down representations of gods from real-world mythologies, with many unique one-off gods scattered about
Can you use mana abilities on an opponents turn
creatures that were often as nefarious as their trainers
Who wants to buy a bunch of cards that might or might not be good after a change in the format (although if this does happen you can totally trade them to someone else on Cardsphere!) and not end up with something good