Dread Summons

Each player puts the top X cards of their library into their graveyard. For each creature card put into a graveyard this way, you create a tapped 2/2 black Zombie creature token.
"Violating the dead's privacy is an oxymoron.
When you die, you shed all secrets and remain
with nothing but your will to serve."
-Cleona, Nephalia's Princess