Black Carriage

Trample, Black Carriage doesn't uncap during your untap step. Sacrifice a creature: Untap Black Carriage. Activate this ability only during your upkeep.
"I saw black horses with eyes of doom, pulling a carriage heading for a tomb.
I saw the casket through the glass, and said a prayer as it went pass. People crying all around. Heading for the burial ground. The horses stood still and bowed their head, as if they new someone was dead."