(: Add or to your mana pool.)
Mire Aqueduct enters the battlefield tapped.
: Mire Aqueduct becomes a 2/1 black and blue Rat creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Mire Aqueduct becomes a 2/1 black and blue Rat creature until end of turn. It's still a land.
