Pearce, the Inferno

Shieldmates - Whenever this creature attacks or
blocks with at least one other creature, those
creatures gain +1/+0 and first strike if it's red and
+0/+1 and vigilance if it's white.
If this creature destroys another creature by
combat, put a +1/+1 counter on each creature
you control.
"I will make them pay for their crimes against the Guildpact."