Grass Assassins are a large enemy found in the Caves area of Episode I.
Like all enemies, Grass Assassins move towards the player. If a Grass Assassin gets close enough, it sprays a web to trap the player, then swipes with its large scythe-like arms.
Once a Grass Assassin takes enough damage, it will quickly turn around and emit a screech, then charge at the player in a straight line. This can deal a lot of damage but is fairly easy to avoid at a distance.
Grass Assassins can drop Grass Assassin's Arms, which can then be taken to Dr. Montague in Unsealed Door (after completing Doc's Secret Plan) and turned into the weapon G-Assassin's Sabers.