Baqual, Profane Princess

At the beginning of your upkeep, you may destroy target creature. If you do, Baqual becomes a copy of that card except its name is still Baqual, Profane Princess, it's legendary in addition to its other types, and it gains this ability.
"Father believes the death of my guards to be the fault of an assassin sent to kill me. Father believes
many things. It's a good thing his lovely daughter is here to assure him he is wrong and that nothing is amiss."