Acropolis Researcher

{2}{w/u}: Put a +1/+1 counter on Acropolis
Researcher and each opponent discards
a card. You draw a card for each card
discarded this way.
Remove X +1/+1 counters from Acropolis
Researcher: You may cast target noncreature
spell from a graveyard with mana value X without paying its mana cost, then exile it.