Sauron of Tol-in-Gaurhoth

Swampwalk, Wither, Ward - Mill 10

Alliance - Whenever Sauron or another non-token
creature enters the battlefield under your control, choose
one that hasn't been chosen this turn:
• Each opponent Mills 1. Create a tapped 1/1 black vampire creature token with flying for each creature that enters the graveyard this way.
• Each opponent Mills 1. Create a 2/2 green werewolf beast creature token for each land that enters the graveyard this way.
• Each opponent Mills