Bane of the Planeswalkers

Bestow {w}{u}{b}{r}{g}(If you cast this card for it's bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Flying, Deathtouch,Trample, Protection from Everything
Enchanted creature gets "Whenever this creature attacks, exile target planeswalker."