Jaw's Abode

Jaw's Abode enters the battlefield tapped.
{t}, Pay 2 life: Add {r} or {g} to your mana pool.
If this mana is spent to cast a spell or activate abilities that targets a creature you control,
put two +1/+1 counters on that creature.

You may think barbarians are not disciplined in battle. You'd be surprised to see the sophisticated battle regiment each warrior goes through.