Resolved Explorer

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
{t}: Flip a coin. If you win the flip, search your library for a land card and put it onto the battlefield tapped. If you lose the flip, sacrifice this creature instead.
He devoted his life to his work, even if it meant an early demise.