Ally's hit roll: 5
Enemy's dodge roll: 19+4

My hit roll: 16
Enemy's dodge roll: 7+4
Status roll: 4/4
Damage roll: 3

I deal 6 (leaving 6HP) damage, and the grass gives an introduction to a new status ailment.
Rotting: Lose 10% of health per action, cannot be revived or saved when you reach 0HP. If the 'Zombie' status is also applied, will instantly become a Rot Zombie, one of the few zombies which 'Cure' and spells like it damage the character*, will have negative HP relating to the victim's old max HP, and a max HP of 0. No known cure as of yet. 

*Will technically ADD HP, but, as it's bringing the HP closer to 0, is actually damaging the creature.

And just a note, that grass doesn't actually occur naturally, anywhere. It's a part of something dealing with the last boss.