(Tranquil Aqueduct isn't a spell.)
When Tranquil Aqueduct enters the battlefield, sacrifice it unless you pay 1 life.
, : Look at target player's hand.
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
, 
: Look at target player's hand.: Add 
to your mana pool. If you played a land this turn, Add 
to your mana pool instead.
