The Petal Knight is a Floor 7 enemy known for being very strong, able to kill most players head-on. Many kill them for Petal Ore, and form parties to farm these. However, while fighting these, they have a weakness. This is related to the real Sword Art Online. If you attack a Petal Knight in a certain spot, you can cause them to stumble and fall to the ground. This is an advantage because you can run for a minute to regenerate. When you achieve the levels of around level 43-46 you will be able to solo this alone without trouble.