Testing Gamers are very prone to superstitions around dice (and to a lesser extent, randomness in general), and will sometimes roll a die many times in order to see if it's fair
The London mulligan lets you draw a fresh 7 cards each time, then put cards back equal to the number of mulligans taken
This was important because the AWOL monster shows up on another card
Going back to our Opt example, if we were to reprint Opt in a future set, any player that already had four copies of Opt would only need to craft or open one copy of Opt from this future set
Drawing two cards for two mana is no joke, especially if the cost is pitching a land we dont need, a spell we cant cast, or a creature we may want to reanimate later
The rise of Naya Burn hurts Infect in multiple ways