When Blackcleave Springs enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
Put Blackcleave Springs on top of your library: Add to your mana pool.
, : Target Orc gets +2/+0 until end of turn.
.
: Add or 
to your mana pool.
to your mana pool. , : Target Orc gets +2/+0 until end of turn.
