Katto,Death by Thousand Cuts

Deathtouch, Prowess.
{t}: Put a -1/-1 counter on target creature.
Katto, Death by Thousand Cuts gets
+1/+1 for every creature on the battlefield
with a -1/-1 counter on it.
"In the dance of blades, a whispering demise awaits, unseen but deeply felt. Each cut tells a tale, and the symphony of suffering plays on in
the silence of shadows."