Djgahtsgdkl, Randomness Barfer

When you cast Djgahtsgdkl, Randomness Barfer
for the first time each game, roll, a die and note
that number.
When Djgahtsgdkl, Randomness Barfer enters
the battlefield, shuffle your library and reveal
cards from the top of it until you reveal a
nonland card with converted mana cost equal to
the number you noted. Cast that card without
paying its mana cost.