(Ravaged Skerry isn't a spell.)
Ravaged Skerry enters the battlefield tapped unless you sacrifice an Ape.
Attacking creatures you control get +1/+0.
: Add to your mana pool.
: Add or to your mana pool. Each opponent gains 1 life.
: Add 
to your mana pool.: Add 
or 
to your mana pool. Each opponent gains 1 life.
