When Goblin Bog enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
Sacrifice Goblin Bog: Add or to your mana pool.
, , Sacrifice Goblin Bog: Destroy target multicolored permanent.
.
: Add or 
to your mana pool. or to your mana pool.
, , Sacrifice Goblin Bog: Destroy target multicolored permanent.
