The Altar

If The Forbidden Summoning isn't on the battlefield, The Altar enters the battlefield tapped. It does not untap during your untap step.
{t}: Add {c}{c}{c} to your mana pool. Use this only to cast spells and activate abilities with {x} in their cost.
Pay 5 Life: Untap The Altar.
At first it filled the people with Hope. . .