Alessa, Witch of the Wood

Vision {1}{u}{b} (You may cast this spell for its vision
cost while you are looking at or revealing it from your
library. If you do, it becomes an illusion in addition to
its other types.)
You may have Alessa enter the battlefield as a
copy of any creature on the battlefield, except
it's an illusion if you paid its vision cost, and
it has "When this creature deals combat damage
to a player, you may destroy target creature with
the same name as this creature."