Haunting Spirits

Xerox (Discard this card and play a spell in exile
with a Page counter on it.)
Target opponent reveals the top seven cards of
their library. You may exile an instant or sorcery
from among them and put a Page a counter on it.
Then put the rest of the cards on the bottom of
their library. Until end of turn you may cast a
spell in exile with a Page counter on it without
paying for its mana cost.