Skeletal Shoal enters the battlefield tapped unless you pay .
: Add to your mana pool.
: Add or to your mana pool. Each opponent gains 1 life.
, Sacrifice Skeletal Shoal: Add to your mana pool.
.
: Add 
to your mana pool.: Add 
or to your mana pool. Each opponent gains 1 life., Sacrifice Skeletal Shoal: Add 
to your mana pool.
