Laekworj, Forestborn Lizard

Forestwalk
When ever a {g} enters your mana pool, Put a +1/+1 counter on target creature you control.
{3}{g}{g}:Target creature you control fights target creature an opponent controls. If your opponents' creature dies to this ability,gain{g}
At the beginning of each opponent's turn, Target creature of their choosing gain Forestwalk.