The cards already in your collection cannot be added to your decks, but rather you use what you get during the event, and with a couple exceptions, you add them to your collection afterward
The borderless frame for Sword of Feast and Famine is one of the most expensive cards in Assassin's Creed, but funnily enough, this version is the cheapest printing of Sword of Feast and Famine on the market
As someone who has mostly interacted with Magic as a massive game with millions of players, digital clients, and a whole universe of content producers and websites, it's hard for me to imagine the game dying
Therefore, Irida is able to give them more of a chance of lasting into later turns, especially if Mistys coin flip did not work
Playing a commander that's just a one or two time mana generating cruise missile probably isn't for everyone, but I can see some merit for hyper aggressive strategies that want to set up fast and hard on turns 3-4 for a really stupid midgame power spike