Gollum

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)
{t}: Exile target land card from a graveyard. Add one mana of any color to your mana pool.
{w/b}, {t} Exile target nonland card from a graveyard. Each opponent loses 2 life.
"Many that live deserve death. Some that die deserve life."