Instructions
Move your on-screen character away from Medusa's mist. This mist, which populates much of the area, will immediately begin to damage your character as soon as you make contact with it. Avoid this mist at all costs.
Kick the boss as many times as you can, until he begins to stumble backwards. As he stumbles, he will be momentarily opened to your attacks.
Use your regular sword attacks to strike as many blows to the boss as you can. After a few seconds, the boss will recover and start to block.
Repeat Step 2 and Step 3 until you have attacked the boss enough times to kill him. Pay attention to his health bar in the corner of the screen -- this is the amount of health he has left. When the bar is depleted, the boss is dead.