Mending of Death

A deck can only have one card named Mending
of Death.
When you cast Mending of Death, if it's the first
time you cast it this game, mill 10, then shuffle it
into its owner's library.
Players may attack and block with creature cards
in their graveyards as though they were on the battlefield. (A creature in a graveyard can't be
tapped and can't die.)