Krosan Den enters the battlefield tapped unless you pay .
, : Add to your mana pool.
: Krosan Den becomes a 0/4 green and white Beast creature with defender until end of turn. It's still a land.
.
, 
: Add 
to your mana pool., : Add to your mana pool.: Krosan Den becomes a 0/4 green and white Beast creature with defender until end of turn. It's still a land.
