Waning Sariel

When Waning Sariel enters the battlefield, exile your hand. Draw a card for each card exiled this way.
At the beginning of your upkeep, if Waning Sariel is on the battlefield, exile it. Each opponent loses 2 life.
At the beginning of your upkeep, if Waning Sariel is exiled, return it to the battlefield. You gain 2 life.
{t}: You may cast one nonland card exiled by Waning Sariel without paying its mana cost.
Do you still whisper at dusk, or cry out for me at midnight?