Balladeer, Shouki no Kami

Menace, Protection from colorless
Balladeer is considered all colors
Creatures with -1/-1 counters are considered
colorless
Whenever Balladeer attacks all creatures target
player controls gain one -1/-1 counter
Pay 5 life: destroy target colorless permanent.
At the beginning of your end step if no creatures
your opponents control entered the graveyard
this turn then flip to Balladeer, 6th Harbinger