Blackcleave Reef enters the battlefield tapped.
: Add or to your mana pool.
Put Blackcleave Reef on top of your library: Add to your mana pool.
, , Sacrifice Blackcleave Reef: Destroy target Rat.
: Add 
or 
to your mana pool.
to your mana pool. 
, , Sacrifice Blackcleave Reef: Destroy target Rat.
