Scrap Collector Clamberjaw

Riot (This creature enter the battlefield with your choice of a +1/+1 counter or haste.)

Whenever Scrap Collector Clamberjaw attack, create 2 tapped treasure token. Whenever you sacrifice a artifact, another target Machine creature you control gains +1/+1 until the end of the turn.

A fierce and agile scavenger that uses it claws and tail to collect scraps.