Tranquil Ruins enters the battlefield tapped.
: Add or to your mana pool.
Sacrifice Tranquil Ruins: Add or to your mana pool.
: Tranquil Ruins becomes a 0/4 white and blue Bird creature with defender until end of turn. It's still a land.
: Add 
or 
to your mana pool. or to your mana pool.
: Tranquil Ruins becomes a 0/4 white and blue Bird creature with defender until end of turn. It's still a land.
