Decimator Beetle

Decimator Beetle

Creature - Insect | Power/Toughness: 4 / 5 (CMC 5)
When Decimator Beetle enters the battlefield, put a -1/-1 counter on target creature you control.
Whenever Decimator Beetle attacks, remove a -1/-1 counter from target creature you control and put a -1/-1 counter on up to one target creature defending player controls.