Kalith, Queen of the Loam

When Kalith, Queen of the Loam enters the battlefield, you may sacrifice a land. If you do,
you may search you library for a land card and
put it onto the battlefield under your control.
Other zombies you control get +1/+1 for each
land card in your graveyard.
"There is power in the decaying earth below and I am
here to draw it out."