Calciform Tubes enters the battlefield tapped.
: Add or to your mana pool.
: Add to your mana pool. Put Calciform Tubes on top of your library.
: Calciform Tubes becomes a 2/1 white and black Knight creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.: Add 
to your mana pool. Put Calciform Tubes on top of your library.: Calciform Tubes becomes a 2/1 white and black Knight creature until end of turn. It's still a land.
