Green Tower enters the battlefield tapped.
: Add or to your mana pool.
Sacrifice Green Tower: Add or to your mana pool.
: Green Tower becomes a 2/2 green and white Snake creature with trample until end of turn. It's still a land.
: Add 
or 
to your mana pool. or to your mana pool.
: Green Tower becomes a 2/2 green and white Snake creature with trample until end of turn. It's still a land.
