Step 16: The hood on Reptile's head can also be a bit tricky, so it's divided into a few parts too. First draw the opening of the hood using a series of vertical and diagonal lines above the eyes.

Step 17: Now draw the top portion of Reptile's hood using the initial circle as a guide. Follow the basic path of the circle as you darken the lines but make the top part more flat.

Step 18: Add three V-shaped lines inside the shape of Reptile's hood for extra detail. The sides of the V-shaped lines should curve and bulge out a little.

Step 19: Finally add two long vertical lines in the middle of Reptile's hood for even more detail.

Step 20: That’s it! You now have a nice sketch of Reptile. You can stop at this quick drawing for a rough, sketchy look or go for a more finished look by continuing to the next step.