Caves Den enters the battlefield tapped unless you pay .
: Add to your mana pool. Caves Den doesn't untap during your next untap step.
: Caves Den becomes a 2/1 black and white Horror creature until end of turn. It's still a land.
.
: Add 
to your mana pool. Caves Den doesn't untap during your next untap step.: Caves Den becomes a 2/1 black and white Horror creature until end of turn. It's still a land.
