(: Add or to your mana pool.)
Treetop Bastion enters the battlefield tapped.
: Treetop Bastion becomes a 2/2 green Squirrel creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
: Treetop Bastion becomes a 2/2 green Squirrel creature until end of turn. It's still a land.
