The Oracle

Unveil {4} — Unveil this identity only if another player attacked you or a King player this game.

When the Oracle is unveiled, reveal the top six cards
of your library. You may put a creature card from among them onto the battlefield under any player's control. It gains “At the beginning of the next end step, return this creature to its owner’s hand.” Then put the rest of the cards revealed this way back on your library in any order.