All that to say, artifact decks will just love this all the same
The upshot of that is: they're going to let you have the treasure, and more often than not
Drawing cards is one of the absolute best things you can do in Magic, and as a result the best ways to do it can cost some serious money
This combo allows you to recoup the two energy you burn with each use of Psydrive (one from your turn naturally and one Gardevoirs ability), essentially guaranteeing 150-damage attacks with no drawbacks
On top of the cuteness, Mews Restart ability is super useful, letting you refill your hand to three once per turn
Consign to Memory is leagues better than Ceremonious Rejection, because as well as the hard counter for colorless spells, it can counter triggered abilities