Horizon Bog enters the battlefield tapped unless you control an enchantment.
, : Add to your mana pool.
: Horizon Bog becomes a 0/4 white and black Bird Spirit creature with defender until end of turn. It's still a land.
, 
: Add 
to your mana pool., : Add to your mana pool.
: Horizon Bog becomes a 0/4 white and black Bird Spirit creature with defender until end of turn. It's still a land.
