Boru, Gruul Warchief

Trample
When Boru, Gruul Warchief attacks, put a +1/+1 counter on all attacking creature you control.
{r/g}{r/g}{r/g}: Regenerate
{r/g}{r/g}{r/g}{r/g}{r/g}: Proliferate
Each of these markings represents a battle I have
fought in. Survived.