The Sphinx of Teban Gate

Flying, hexproof
{u}{u}{u}, {t}: Draw two cards, then choose a card
in your hand. Target opponent guesses whether
that card is land or nonland. Reveal it. If they
guessed wrong, put a +1/+1 counter on The
Sphinx of Teban Gate. Otherwise, that opponent
may untap a land they control.
"...freedom or death."