The London mulligan lets you draw a fresh 7 cards each time, then put cards back equal to the number of mulligans taken
A showcase version features line art, inspired by classic D&D books from even earlier editions
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
There seems like thered be too many instances of having Sylvia Brightspear on the field and a hand of knights, or Khorvath Brightflame on the field with a field full of dragons (that's rarely a bad thing, but I think Ive made my point)
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