Raven Shaman

{t}: Exile target land card from a graveyard. Add one mana of any color to your mana pool.
{t}: Exile target instant or sorcery card from a graveyard. Each player higher than you on the leaderboard loses 2 life.
{t}: Exile target creature card from a graveyard. Each player equal to or lower than you on the leaderboard gains 2 life.