Darien, the Cursed King

Whenever another creature dies, you gain 1 life.
Sacrifice another creature: Return up to one
target land card from your graveyard to your
hand.
Pay 4 Life: Return Darien, the Cursed King
from your graveyard to the battlefield.
Once the last king of Kjeldor, now the first
king of Lim-Dul's corrupted forests.