Helafene, Curator Protege

At the beginning of your upkeep, remove a time counter from each card exiled with Helafene. If a card exiled by Helafene has no time counters on it, return it to your hand.
{t}: Exile target nonland card from your graveyard with one time counter on it.
"I asked not for this power, though it is all I have. I will not abandon it nor myself."