Foundry Aqueduct enters the battlefield tapped unless you pay .
: Add or to your mana pool.
Put Foundry Aqueduct on top of your library: Add to your mana pool.
, , Sacrifice Foundry Aqueduct: Target player draws two cards, then discards two cards.
.
: Add 
or 
to your mana pool.
to your mana pool. , , Sacrifice Foundry Aqueduct: Target player draws two cards, then discards two cards.
