Prosperous Burgomaster

When Sengir Autocrat enters the battlefield,
create four 0/1 black Human Serf creature tokens.
-{2}{w}{t} Sacrifice a Serf: Create two 0/1 black
Serf creature tokens and a colorless Treasure
artifact token with "Tap, Sacrifice this artifact:
Add one mana of any color."
-Serfs you control gain +1/+1, Mangle, and
cannot be Exiled.
"The Baron cares only about obedience. The King
thinks only of his Witches. My fellows and I are
rich, but still mere slaves."