Sketching in 20 minutes, Redesigning MK character

Hello, here comes the

New Challenger...

Reptile:

Drew this one in 20 minutes or so, practicing quick sketching to save the time when drawing. The goal is to free the hand and use eraser in the same amount as the brush or ink or pen.

After this one if I wished I could go into a detailed ink version, full color version, concept art, render etc.

Have a nice day people!