Amora, Spark Kindred

As long as Amora, Spark Kindred is attacking a planeswalker, she can't be blocked.
Whenever a planeswalker leaves the battlefield, exile Amora, Spark Kindred, then return her to the battlefield transformed under her owner's control.
"I'll seize what's rightfully mine brother, from you or anybody else that has what I seek." -Amora to Balrei