Step 11: Under the knee, draw another small circle as a guide for the calf section of Thanos' leg. Below the calf, draw two vertical lines with a curved line at the bottom for the shin section of the leg. At the bottom, draw a blocky shape as a guide for the foot.
Step 12: On the left side, draw another U-shaped line with a circle underneath for Thanos' other leg and knee.
Step 13: Below that, draw another circle and lines as guides for the calf and shin sections of the leg. At the bottom, draw a guide for Thanos' foot. It should be a triangle- like shape with a flat tip that points to the left.
That's it for the guides! For the next steps, use darker lines for a more defined drawing.
Step 14: Inside the head, lightly sketch a couple of small ovals for Thanos' eyes. Place the eyes above the horizontal construction line and on either side of the vertical line. Don't make them too big. Above each oval, draw a short, diagonal line for the heavy brow over each eye. Curve the outer tips of the lines down and the inner tips up to furrow the brow.
Darken the shapes of Thanos' eyes but don't overlap the lines for the brow. Make the shapes of the eyes a bit blockier as you darken the lines. The top and bottom edges of the eyes curve downward a bit like rainbows. Inside each eye, draw a small circle for the irises. In the middle of each iris, draw a tiny dot for the pupils. Below each eye, draw a short line for the bags under the eyes.