Blackcleave-works enters the battlefield tapped.
: Add or to your mana pool.
Put Blackcleave-works on top of your library: Add to your mana pool.
, , Sacrifice Blackcleave-works: Target player draws two cards, then discards two cards.
: Add 
or 
to your mana pool.
to your mana pool. , , Sacrifice Blackcleave-works: Target player draws two cards, then discards two cards.
