Festyr, Lich Captain

Deathtouch, Menace
When Festyr, Lich Captain enters the battlefield,
put the top four cards of your library into your
graveyard, then for each creature card in your
graveyard, create a colorless Treasure artifact
token with "{t}, Sacrifice this artifact: Add one
mana of any color to your mana pool."
"You're more valuable in death than in life."