A-Winota, Joiner of Forces (IKO-A-216) [Ikoria: Lair of Behemoths]

Whenever one or more non-Human creatures you control attack, look at the top six cards of your library. You may put a Human creature card from among them onto the battlefield tapped and attacking. It gains indestructible until end of turn. Put the rest of the cards on the bottom of your library in a random order.