Sannen, Shepherd of Sinners

When Sannen, Shepherd of Sinners enters the battlefield, create three 1/1 white and black Spirit creature tokens with flying.
When Sannen, Shepherd of Sinners attacks,
exile up to two creature cards from a graveyard.
Create that many 2/2 black zombie creature
tokens. Those tokens enter the battlefield tapped
and attacking.
"Your duty to the Render of Decay is eternal."