Gladion's Showdown can only be activated when it is the final card in your hand, like a true brooding antihero, Gladion works alone and won't come out until your other cards are gone
Before I go off on any tangents, I'll tell you that I got lucky
Urza's Command can drop the power of other player's dorks out of nowhere, make a Powerstone, make a tapped Construct token to win the game, and then scry and draw, so I think that the Construct and scry and card draw are the default here, and that's pretty good for four mana instant speed
A good deck box should be made from archival-safe, non-PVC, rigid polypropylene materials that will protect the cards from damage and deterioration
Monocolored legendary creatures with three differently colored activation costs