Oona, the Pirate Queen

You may pay {b}{b} and discard a card
instead of paying this cards mana cost.
When Oona enters the battlefield destroy target creature.
"I realize, anchor not only thing holding me down. Arranged marriage, fat-ass, selfish husband,
backward kingdom full of moron, they all imprison me.
Where is my simple girlhood dream of being greatest amphibian warrior?"