Black Harvest

Sacrifice any number of Human Slave creature
tokens. Turn X number of target lands into
swamps until Black Harvest leaves the battlefield,
where X is the number of Human Slave tokens
sacrificed. Black Harvest deals X amount of
damage to you
"The children looked like remnants of themselves.
Spectral. Many of them had sores on their faces.
None had shoes. He could see the structures of them
through their skin. The bony residue of their lives."