The Fifth Alias [Unknown Event]

Set: Unknown Event Type: Legendary Creature — Shapeshifter Rarity: Rare Cost: {2}{U}{R}{W} Before the game begins, if The Fifth Alias is your commander or in your deck, secretly make a list of five nonland cards in your deck. (Don't forget to do this!)As you draw a card on your list, you may reveal it, show it was on the list, and exclaim its name. If you do, cast it without paying its mana cost.