Ruby Lancaster

{g/w}{t}: Prevent the next X damage that would be
done to target player or permanent, where X is
Ruby's toughness. If you prevented less than X
using this ability, you may gain the difference
as life.
{w}{w}{g}{g}, sacrifice Ruby Lancaster: Choose a creature in any graveyard or in exile. Put that
creature back on the battlefield, tapped, under
it's owner control.