Brute Wyvern Hunter

Put a +1/1 counter on Brute Wyvern Hunter
whenever a Brute Wyvern is killed
Brute Wyvern Hunter gets +1/+1 for each
Brute Wyvern controlled by an opponent.
{3}{r/g}: Deal 5 damage to target Brute Wyvern
{4}{r/g}{r/g}: Destroy target Brute Wyvern