Pigface, Apprentice of Jigsaw

Shroud
Whenever one or more other creatures
die, that creature's controller investigates.
(They create a colorless Clue artifact token
with "{2}, Sacrifice this artifact: Draw a card.").
This ability triggers only once each turn.
Whenever an opponent sacrifices a token, they
mill three cards. (To mill a card, a player puts the
top card of their library into their graveyard.)