These always appear in threes, causing Berserk status with their Wing Snap attack.
The Grasswyrm, also known as WeedFeeder is an enemy in Final Fantasy VI.
It can Berserk characters with its special attack, Wing Snap. It is weak to Fire, so anyone who has learned that spell can cast it to cause heavy damage. Sabin's Rising Phoenix also works well against them, especially if they attack in groups.
1st Turn: Attack (66%) or Wing Snap (33%)
2nd Turn: Attack (66%) or Nothing (33%)
3rd Turn: Attack (66%) or Nothing (33%)