Step 25: Draw a series of lines inside the torso for more design elements on Thanos' shirt. Add a few curved lines around the opening of the shirt at the top. Add a couple more curved lines across the chest but then angle them down to meet the belt.
Step 26: Darken the outer edges of the shapes on the left to create Thanos' other arm. Make the lines a bit more angular and add a few lines within the shape for muscle definition.
Step 27: Use the circle at the bottom as a guide to draw Thanos' fist. Follow the path of the circle but make the fist blockier. Use short, curved lines for the folded thumb on the right. Draw a few lines at the bottom for the folded fingers. Add a curved line below the thumb for the index finger.
Step 28: Darken the sides of the U-shaped guide on the right for the top of the first leg. Draw a few short lines under the belt for the detail on Thanos' pants. Below that, draw a hexagonal shape inside the initial circle for the knee protector. Draw a few angled lines inside the shape for the detail on the knee protector.
Step 29: Use the shapes under the knee as guides to draw Thanos' big boot. Draw a line similar to the letter V below the knee for the design on the boot. Darken the outer edges of the initial guides to create the overall shape of the boot. Add a few lines within the shape for extra detail on the boot.