The Fifth Alias

Legendary Creature — Shapeshifter5/5

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.

Not legal in Commander

View The Fifth Alias on Scryfall