Aristolen, City of Science

{t}: Add one mana of any color. Activate only
while Aristolen, City of Science is a land.
Experiment - During your turn, after casting a
sorcery spell and a creature spell, draw a card,
then discard a card.
As long as Aristolen, City of Science is your active plane, whenever you discard a card, discard it into
exile. You may cast it from exile until end of
turn, otherwise put it into your graveyard.