Heidi's Archive

Hidden catalogue 6 (As this enters the library zone,
put the top six cards of a library you own face down
on top of this card as a new library. As this becomes
empty, put it into its owner's graveyard.)

Each card in this library has miracle. Its miracle cost
is equal to its mana cost reduced by {4}. (You may
cast that card for its miracle cost when you draw it
if it's the first card you drew this turn.)

"How did Heidi manage to record all ofthis?"