Blackcleave Store enters the battlefield tapped.
: Add or to your mana pool.
Sacrifice Blackcleave Store: Add or to your mana pool.
: Blackcleave Store becomes a 2/1 black and white Horror creature until end of turn. It's still a land.
: Add 
or 
to your mana pool. or to your mana pool.: Blackcleave Store becomes a 2/1 black and white Horror creature until end of turn. It's still a land.
