Whether youre attacking or using another ability, you get a free proliferate trigger, which is just absurd
Instead, Mono-Blue often wins by drawing four cards, untapping three permanents, copying a spell, flickering an Artifact multiple times, and then saying, "I would like to present an infinite loop from here." And to help you get to that point in the game, a great Mono-Blue Commander should be able to give you repeatable value in one form or another
Ive personally been playing two copies in my sideboard of Blue-Red Murktide and have been loving it, as your opponent generally brings in more removal spells to combat your creatures in post-board games, and a planeswalker like Jace is the perfect foil to that plan
Each player opens their first pack, picks a card, and then passes the remaining cards to the player on their left