Gur Asthaan, Yubaran Herald

Whenever Gur Asthaan, Yubaran Herald blocks alone, attacking players sacrifices a creature.
At the beginning of each opponent's upkeep, that player shuffles a random nonland card from their graveyard into their library, if they do, put the top card of your library into your graveyard.
"You see me as some kind of monster yet you are the ones that fight and kill for glory, fame and riches."