Scion of Shattered Souls

As long as there are no -1/-1 counters on
creatures you control, Scion of Shattered Souls
isn't a creature.
Whenever Scion of Shattered Souls enters the battlefield or attacks, put a -1/-1 counter on
target creature or remove one from it.
Creatures you control have wither and persist.
Evoke Madness {w}{w/b}{b}