You, Magic Playtester

Legendary Creature — Human Gamer1/3

{T}: Choose target playtest card. Increase or decrease a number of your choice on it by one for as long as it remains on the stack or battlefield. {W}{U}{B}{R}{G}: Reveal the top 8 cards of your library. Put each playtest card among them into your hand, and the rest on the bottom of your library in a random order.

Not legal in Commander

View You, Magic Playtester on Scryfall