Hill of the Slain

{t}: Add {b} to your mana pool for each creature
in your opponent's graveyard.
{g}{g}: Put one moss counter on Hill of the Slain. When there are four moss counters on it, sacrifice it. Any player may play this ability.
"But there alone in all the desert wrought by Morgoth, grass grew again long and green upon that hill, and no minion of Morgoth walked where the swords of the Eldar and the Edain crumbled into rust."