Ursula, Sea Witch

When Ursula, Sea Witch is cast Silence target creature until Ursula, Sea Witch leaves the battlefield.(creature loses all abilities)
In addition to its mana cost you may pay {u}{b}{u/b} when this card is cast.
It becomes a copy of target Silenced creature.
When Ursula, Sea Witch is put in the graveyard
from the battlefield, and it copied a creature return
it to the battlefield transformed.