The Celestus

If it's neither day nor night, it becomes day as
The Celestus enters the battlefield.
{t}: Add one mana of any color.
{3},{t}: If it's night, it becomes day. Otherwise,
it becomes night. Activate only as a sorcery.
Whenever day becomes night or night
becomes day, you gain 1 life. You may draw a
card. If you do, discard a card.